Spellbreaker Behemoth

Creature — Beast (5/5)

This spell can't be countered.
Creature spells you control with power 5 or greater can't be countered.

Stampede Surfer

Creature — Human Warrior (4/4)

Haste
Whenever Stampede Surfer attacks, for each opponent, you create a 2/2 green Boar creature token that's tapped and attacking that opponent.

Stangg, Echo Warrior

Legendary Creature — Human Warrior (3/4)

Whenever Stangg, Echo Warrior attacks, create Stangg Twin, a legendary 3/4 red and green Human Warrior creature token. It enters the battlefield tapped and attacking. For each Aura and Equipment attached to Stangg, create a token that's a copy of it attached to Stangg Twin. Sacrifice all tokens created this way at the beginning of the next end step.

Stonebrow, Krosan Hero

Legendary Creature — Centaur Warrior (4/4)

Trample
Whenever a creature you control with trample attacks, it gets +2/+2 until end of turn.

Strax, Sontaran Nurse

Legendary Creature — Alien Cleric (5/5)

Vigilance, trample
Grenades! — , , Sacrifice an artifact: Choose a player at random. When you do, Strax fights another target creature that player controls.
Glory of Battle — Whenever Strax deals damage to a creature, put a +1/+1 counter on Strax.

Streetbreaker Wurm

Creature — Wurm (6/4)

Strider, Ranger of the North

Legendary Creature — Human Ranger (4/4)

Landfall — Whenever a land enters the battlefield under your control, target creature gets +1/+1 until end of turn. Then if that creature has power 4 or greater, it gains first strike until end of turn.

Sunastian Falconer

Legendary Creature — Human Shaman (4/4)

: Add .

Sunder Shaman

Creature — Giant Shaman (5/5)

Sunder Shaman can't be blocked by more than one creature.
Whenever Sunder Shaman deals combat damage to a player, destroy target artifact or enchantment that player controls.

Svella, Ice Shaper

Legendary Snow Creature — Troll Warrior (2/4)

, : Create a colorless snow artifact token named Icy Manalith with ": Add one mana of any color."
, : Look at the top four cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

Tahngarth, First Mate

Legendary Creature — Minotaur Warrior (5/5)

Tahngarth, First Mate can't be blocked by more than one creature.
Whenever an opponent attacks with one or more creatures, if Tahngarth is tapped, you may have that opponent gain control of Tahngarth until end of combat. If you do, choose a player or planeswalker that opponent is attacking. Tahngarth is attacking that player or planeswalker.

Tana, the Bloodsower

Legendary Creature — Elf Druid (2/2)

Trample
Whenever Tana, the Bloodsower deals combat damage to a player, create that many 1/1 green Saproling creature tokens.
Partner (You can have two commanders if both have partner.)

Tattermunge Duo

Creature — Goblin Warrior Shaman (2/3)

Whenever you cast a red spell, Tattermunge Duo gets +1/+1 until end of turn.
Whenever you cast a green spell, Tattermunge Duo gains forestwalk until end of turn. (It can't be blocked as long as defending player controls a Forest.)

The Fugitive Doctor

Legendary Creature — Time Lord Doctor (4/4)

When The Fugitive Doctor enters the battlefield, investigate.
Whenever The Fugitive Doctor attacks, you may sacrifice a Clue. When you do, target instant or sorcery card in your graveyard gains flashback until end of turn. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

The Lady of Otaria

Legendary Creature — Avatar (5/5)

You may tap three untapped Dwarves you control rather than pay this spell's mana cost.
At the beginning of each end step, if a land you controlled was put into your graveyard from the battlefield this turn, reveal the top four cards of your library. Put any number of Dwarf cards from among them into your hand. Put the rest on the bottom of your library in a random order.

The Space Family Goblinson

Legendary Creature — Goblin Guest (1/1)

The Space Family Goblinson has trample as long as you've rolled three or more dice this turn.
Whenever you roll a die, put a +1/+1 counter on The Space Family Goblinson.

Thrakkus the Butcher

Legendary Creature — Dragon Peasant (3/4)

Trample
Whenever Thrakkus the Butcher attacks, double the power of each Dragon you control until end of turn.

Thromok the Insatiable

Legendary Creature — Hellion (0/0)

Devour X, where X is the number of creatures devoured this way (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with X +1/+1 counters on it for each of those creatures.)

Tin Street Gossip

Creature — Lizard Advisor (4/4)

Vigilance
: Add . Spend this mana only to cast face-down spells or to turn creatures face up.

Tovolar, Dire Overlord // Tovolar, the Midnight Scourge

Legendary Creature — Human Werewolf // Legendary Creature — (3/3)

Whenever a Wolf or Werewolf you control deals combat damage to a player, draw a card.
At the beginning of your upkeep, if you control three or more Wolves and/or Werewolves, it becomes night. Then transform any number of Human Werewolves you control.
Daybound

Tovolar, the Midnight Scourge

Whenever a Wolf or Werewolf you control deals combat damage to a player, draw a card.
: Target Wolf or Werewolf you control gets +X/+0 and gains trample until end of turn.
Nightbound