Red Mana Battery

Brass's Tunnel-Grinder // Tecutlan, the Searing Rift

Legendary Artifact // Legendary Land — Cave

When Brass's Tunnel-Grinder enters the battlefield, discard any number of cards, then draw that many cards plus one.
At the beginning of your end step, if you descended this turn, put a bore counter on Brass's Tunnel-Grinder. Then if there are three or more bore counters on it, remove those counters and transform it. (You descended if a permanent card was put into your graveyard from anywhere.)

Tecutlan, the Searing Rift

(Transforms from Brass's Tunnel-Grinder.)
: Add .
Whenever you cast a permanent spell using mana produced by Tecutlan, the Searing Rift, discover X, where X is that spell's mana value.

Glittering Stockpile

Artifact — Treasure

: Add . Put a stash counter on Glittering Stockpile.
, Sacrifice Glittering Stockpile: Add X mana of any one color, where X is the number of stash counters on Glittering Stockpile.

Dowsing Device // Geode Grotto

Artifact // Land — Cave

Whenever Dowsing Device or another artifact enters the battlefield under your control, up to one target creature you control gets +1/+0 and gains haste until end of turn. Then transform Dowsing Device if you control four or more artifacts.

Geode Grotto

(Transforms from Dowsing Device.)
: Add .
, : Until end of turn, target creature gains haste and gets +X/+0, where X is the number of artifacts you control. Activate only as a sorcery.

Quintorius Kand

Legendary Planeswalker — Quintorius

Whenever you cast a spell from exile, Quintorius Kand deals 2 damage to each opponent and you gain 2 life.
+1: Create a 3/2 red and white Spirit creature token.
?3: Discover 4.
?6: Exile any number of target cards from your graveyard. Add for each card exiled this way. You may play those cards this turn.

Urabrask // The Great Work

Legendary Creature — Phyrexian Praetor // Enchantment — Saga (4/4)

First strike
Whenever you cast an instant or sorcery spell, Urabrask deals 1 damage to target opponent. Add .
: Exile Urabrask, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery and only if you've cast three or more instant and/or sorcery spells this turn.

The Great Work

(As this Saga enters and after your draw step, add a lore counter.)
I — The Great Work deals 3 damage to target opponent and each creature they control.
II — Create three Treasure tokens.
III — Until end of turn, you may cast instant and sorcery spells from any graveyard. If a spell cast this way would be put into a graveyard, exile it instead. Exile The Great Work, then return it to the battlefield (front face up)

Chandra, Dressed to Kill

Legendary Planeswalker — Chandra

+1: Add . Chandra, Dressed to Kill deals 1 damage to up to one target player or planeswalker.
+1: Exile the top card of your library. If it's red, you may cast it this turn.
?7: Exile the top five cards of your library. You may cast red spells from among them this turn. You get an emblem with "Whenever you cast a red spell, this emblem deals X damage to any target, where X is the amount of mana spent to cast that spell."

Ojer Axonil, Deepest Might // Temple of Power

Legendary Creature — God // Land (4/4)

Trample
If a red source you control would deal an amount of noncombat damage less than Ojer Axonil's power to an opponent, that source deals damage equal to Ojer Axonil's power instead.
When Ojer Axonil dies, return it to the battlefield tapped and transformed under its owner's control.

Temple of Power

(Transforms from Ojer Axonil, Deepest Might.)
: Add .
, : Transform Temple of Power. Activate only if red sources you controlled dealt 4 or more noncombat damage this turn and only as a sorcery.

Hidden Volcano

Land — Cave

Hidden Volcano enters the battlefield tapped.
: Add .
, , Sacrifice Hidden Volcano: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Sokenzan, Crucible of Defiance

Legendary Land

: Add .
Channel — , Discard Sokenzan, Crucible of Defiance: Create two 1/1 colorless Spirit creature tokens. They gain haste until end of turn. This ability costs less to activate for each legendary creature you control.

Mountain

Basic Land — Mountain

(: Add .)

The Autonomous Furnace

Land — Sphere

The Autonomous Furnace enters the battlefield tapped.
: Add .
, , Sacrifice The Autonomous Furnace: Draw a card.

Geistflame Reservoir

Artifact

Whenever you cast an instant or sorcery spell, put a charge counter on Geistflame Reservoir.
, , Remove any number of charge counters from Geistflame Reservoir: It deals that much damage to any target.
, : Exile the top card of your library. You may play that card this turn.

Mountain // Mountain

(: Add .)

Mountain

(: Add .)

Sunbird Standard // Sunbird Effigy

Artifact // Artifact Creature — Bird Construct (0/0)

: Add one mana of any color.
Craft with one or more (, Exile this artifact, Exile one or more other permanents you control and/or cards from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

Sunbird Effigy

Flying, vigilance, haste
Sunbird Effigy's power and toughness are each equal to the number of colors among the exiled cards used to craft it.
: For each color among the exiled cards used to craft Sunbird Effigy, add one mana of that color.

Dollhouse of Horrors

Artifact

, , Exile a creature card from your graveyard: Create a token that's a copy of the exiled card, except it's a 0/0 Construct artifact in addition to its other types and it has "This creature gets +1/+1 for each Construct you control." It gains haste until end of turn. Activate only as a sorcery.

Dramatist's Puppet

Artifact Creature — Construct (2/4)

When Dramatist's Puppet enters the battlefield, for each kind of counter on target permanent, put another counter of that kind on it or remove one from it.

Foreboding Statue // Forsaken Thresher

Artifact Creature — Construct // Artifact Creature — Constru (1/2)

: Add one mana of any color. Put an omen counter on Foreboding Statue.
At the beginning of your end step, if there are three or more omen counters on Foreboding Statue, untap it, then transform it.

Forsaken Thresher

At the beginning of your precombat main phase, add one mana of any color.

Matzalantli, the Great Door // The Core

Legendary Artifact // Legendary Land

: Draw a card, then discard a card.
, : Transform Matzalantli, the Great Door. Activate only if there are four or more permanent types among cards in your graveyard. (Artifact, battle, creature, enchantment, land, and planeswalker are permanent types.)

The Core

(Transforms from Matzalantli.)
Fathomless descent — : Add X mana of any one color, where X is the number of permanent cards in your graveyard.

Sword of Forge and Frontier

Artifact — Equipment

Equipped creature gets +2/+2 and has protection from red and from green.
Whenever equipped creature deals combat damage to a player, exile the top two cards of your library. You may play those cards this turn. You may play an additional land this turn.
Equip

Realmbreaker, the Invasion Tree

Legendary Artifact

, : Target opponent mills three cards. Put a land card from their graveyard onto the battlefield tapped under your control. It gains "If this land would leave the battlefield, exile it instead of putting it anywhere else."
, , Sacrifice Realmbreaker, the Invasion Tree: Search your library for any number of Praetor cards, put them onto the battlefield, then shuffle.