Heroes' Bane enters the battlefield with four +1/+1 counters on it.
: Put X +1/+1 counters on Heroes' Bane, where X is its power.

: Remove up to X counters from target permanent. For each counter removed this way, Hex Parasite gets +1/+0 until end of turn. ( can be paid with either or 2 life.)

This spell costs less to cast if there are ten or more nonland permanents on the battlefield.
Destroy all nonland permanents.

Whenever a creature enters the battlefield, that creature's controller may have it deal damage equal to its power to any target of their choice.
Whenever you roll {CHAOS}, exile target creature, then return it to the battlefield under its owner's control.

Incendiary Flow deals 3 damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Destroy target land. Into the Maw of Hell deals 13 damage to target creature.

Target creature gets +2/+2 until end of turn. If it's paired with a creature, that creature also gets +2/+2 until end of turn.

Devoid (This card has no color.)
Whenever you cast a colorless spell, Kozilek's Sentinel gets +1/+0 until end of turn.

Whenever another creature dies, you may put X +1/+1 counters on Kresh the Bloodbraided, where X is that creature's power.

When Kuldotha Flamefiend enters the battlefield, you may sacrifice an artifact. If you do, Kuldotha Flamefiend deals 4 damage divided as you choose among any number of targets.

Creatures you control get +2/+1 until end of turn.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, those creatures also gain vigilance until end of turn. (Attacking doesn't cause them to tap.)

You may look at the top card of your library and at face-down creatures you don't control any time.

Lightning Helix deals 3 damage to any target and you gain 3 life.

Double strike, haste
Whenever Lightning Runner attacks, you get (two energy counters), then you may pay . If you pay, untap all creatures you control, and after this phase, there is an additional combat phase.

Enchant creature
Whenever enchanted creature becomes tapped, Lust for War deals 3 damage to that creature's controller.
Enchanted creature attacks each combat if able.

Flying
When Magma Phoenix dies, it deals 3 damage to each creature and each player.
: Return Magma Phoenix from your graveyard to your hand.

Counter target spell. At the beginning of your next main phase, add an amount of equal to that spell's converted mana cost.

( can be paid with either or 2 life.)
Marrow Shards deals 1 damage to each attacking creature.

Target creature gets +3/+0 until end of turn.
Target creature gets +0/+3 until end of turn.

When Mitotic Slime dies, create two 2/2 green Ooze creature tokens. They have "When this creature dies, create two 1/1 green Ooze creature tokens."