Haste Whenever Thraximundar attacks, defending player sacrifices a creature. Whenever a player sacrifices a creature, you may put a +1/+1 counter on Thraximundar.

Flying, trample You can't win the game and your opponents can't lose the game.

When Abyssal Gorestalker enters the battlefield, each player sacrifices two creatures.

{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.

As an additional cost to cast this spell, sacrifice a creature. Draw two cards.

Commander creatures you own have "Whenever this creature attacks a player, if no opponent has more life than that player, put a +1/+1 counter on this creature. It gains deathtouch and indestructible until end of turn."

As long as it's your turn, Ahn-Crop Invader has first strike. {1}, Sacrifice another creature: Ahn-Crop Invader gets +2/+0 until end of turn.