Magma Mine

Triangle of War

Artifact

, Sacrifice Triangle of War: Target creature you control fights target creature an opponent controls. (Each deals damage equal to its power to the other.)

Juju Bubble

Artifact

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When you play a card, sacrifice Juju Bubble.
: You gain 1 life.

Brass-Talon Chimera

Artifact Creature — Chimera (2/2)

First strike
Sacrifice Brass-Talon Chimera: Put a +2/+2 counter on target Chimera creature. It gains first strike. (This effect lasts indefinitely.)

Iron-Heart Chimera

Artifact Creature — Chimera (2/2)

Vigilance
Sacrifice Iron-Heart Chimera: Put a +2/+2 counter on target Chimera creature. It gains vigilance. (This effect lasts indefinitely.)

Lead-Belly Chimera

Artifact Creature — Chimera (2/2)

Trample
Sacrifice Lead-Belly Chimera: Put a +2/+2 counter on target Chimera creature. It gains trample. (This effect lasts indefinitely.)

Tin-Wing Chimera

Artifact Creature — Chimera (2/2)

Flying
Sacrifice Tin-Wing Chimera: Put a +2/+2 counter on target Chimera creature. It gains flying. (This effect lasts indefinitely.)

Diamond Kaleidoscope

Artifact

, : Create a 0/1 colorless Prism artifact creature token.
Sacrifice a Prism token: Add one mana of any color.

Phyrexian Marauder

Artifact Creature — Phyrexian Construct (0/0)

Phyrexian Marauder enters the battlefield with X +1/+1 counters on it.
Phyrexian Marauder can't block.
Phyrexian Marauder can't attack unless you pay for each +1/+1 counter on it.

Dragon Mask

Artifact

, : Target creature you control gets +2/+2 until end of turn. Return it to its owner's hand at the beginning of the next end step. (Return it only if it's on the battlefield.)

Matopi Golem

Artifact Creature — Golem (3/3)

: Regenerate Matopi Golem. When it regenerates this way, put a -1/-1 counter on it.

Snake Basket

Artifact

, Sacrifice Snake Basket: Create X 1/1 green Snake creature tokens. Activate only as a sorcery.

Teferi's Puzzle Box

Artifact

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

Wand of Denial

Artifact

: Look at the top card of target player's library. If it's a nonland card, you may pay 2 life. If you do, put it into that player's graveyard.

Anvil of Bogardan

Artifact

Players have no maximum hand size.
At the beginning of each player's draw step, that player draws an additional card, then discards a card.

Helm of Awakening

Artifact

Spells cost less to cast.

Phyrexian Walker

Artifact Creature — Phyrexian Construct (0/3)

Sands of Time

Artifact

Each player skips their untap step.
At the beginning of each player's upkeep, that player simultaneously untaps each tapped artifact, creature, and land they control and taps each untapped artifact, creature, and land they control.

Sisay's Ring

Artifact

: Add .

Elephant Grass

Enchantment

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Black creatures can't attack you.
Nonblack creatures can't attack you unless their controller pays for each creature they control that's attacking you.

Resistance Fighter

Creature — Human Soldier (1/1)

Sacrifice Resistance Fighter: Prevent all combat damage target creature would deal this turn.