Counter target spell unless its controller pays .

Corrupted — Counter that spell instead if its controller has three or more poison counters.

Whenever one or more Demons you control attack a player, you draw a card and lose 1 life.

At the beginning of your end step, create a 5/5 black Demon creature token with flying, then mill two cards. If two cards that share all their card types were milled this way, sacrifice Demonic Covenant.

Choose up to two target creatures you don't control. For each of those creatures, create a token that's a copy of that creature. Those tokens gain haste. Exile them at the beginning of the next end step.

Flash

Enchant creature

When Maze's Mantle enters, if enchanted creature has toxic, that creature gains hexproof until end of turn.

Enchanted creature gets +2/+2.

Haste

Landfall — Whenever a land you control enters, Reckless Pyrosurfer gains battle cry until end of turn. (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn. Each instance of battle cry triggers separately.)

Destroy target creature an opponent controls. That player loses 3 life. Exile Suspended Sentence with three time counters on it.

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)

I, II — Another target nonland permanent phases out. It can't phase in for as long as you control The Phasing of Zhalfir.

III — Destroy all creatures. For each creature destroyed this way, its controller creates a 2/2 black Phyrexian creature token.