Search target opponent's library for an artifact card and put that card onto the battlefield under your control. Then that player shuffles their library.

Arcane Sanctum enters the battlefield tapped.
: Add , , or .

Distribute four +1/+1 counters among any number of target creatures.
Miracle (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Blighted Agent can't be blocked.

Exile the top five cards of your library. An opponent separates those cards into two piles. You may play lands and cast spells from one of those piles. If you cast a spell this way, you cast it without paying its mana cost.

If you control an Eldrazi Spawn, create three 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this creature: Add ." Otherwise, create one of those tokens.

Flying
Whenever Chasm Drake attacks, target creature you control gains flying until end of turn.

Prevent all combat damage that would be dealt this turn.
Fateful hour — If you have 5 or less life, tap all attacking creatures. Those creatures don't untap during their controller's next untap step.

, : Exile target artifact card from a graveyard. Put a charge counter on Conversion Chamber.
, , Remove a charge counter from Conversion Chamber: Create a 3/3 colorless Golem artifact creature token.

Counter target noncreature spell. Its controller loses 2 life.

At the beginning of your upkeep, put a despair counter on Descent into Madness, then each player exiles X permanents they control and/or cards from their hand, where X is the number of despair counters on Descent into Madness.

Kicker (You may pay an additional as you cast this spell.)
Create a 7/1 red Elemental creature token with trample and haste. Exile it at the beginning of the next end step. If this spell was kicked, that creature gets +7/+0 until end of turn.

Sacrifice all creatures you control, then create that many 4/4 red Hellion creature tokens.

Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Trample
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Shroud (This creature can't be the target of spells or abilities.)

Vigilance
Kemba's Legion can block an additional creature each combat for each Equipment attached to Kemba's Legion.

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

If three or more creatures are attacking, you may pay rather than pay this spell's mana cost.
Attacking creatures get -3/-0 until end of turn.

Destroy target nonland permanent and all other permanents with the same name as that permanent.