When Cosmic Colossus enters, if you cast it from your hand, cast a copy of target card in exile without paying its mana cost unless an opponent exiles two nonland permanents they control.

Flying, ward {1}
Whenever you cast an instant or sorcery spell, mill a card. Return an instant or sorcery card milled this way to your hand. If you can't, put a +1/+1 counter on Covetous Frostwyrm.

{2}, Sacrifice another creature: Put a +1/+1 counter on Coward-Eater. Draw a card.

Gain control of target permanent. Untap it. It gains haste until end of turn.

Trample
Whenever one or more creatures you control with trample deal combat damage to a player or planeswalker, put a +1/+1 counter on target creature you control.

Crowdqueller Golem enters the battlefield tapped.

Cruiser Technician can't be blocked except by artifact creatures.
Whenever you amp it up, draw two cards, then discard two cards.

The next spell you cast this turn may be cast as though it had flash. When you cast that spell, copy it. You may choose new targets for the copy.
Flashback {3}{U}{U}

Destroy target artifact or land.
Flashback {4}{R}{R}

[+1]: Crux deals 1 damage to target player or planeswalker. Put a chain counter on up to one target artifact or nonbasic land. It loses all abilities except mana abilities as long as it has a chain counter on it.
[–2]: Discard a card. When you do, Crux deals damage equal to the discarded card's mana value to up to one target creature and you draw a card.
[–6]: Exile target red instant or sorcery card from your graveyard. Add {R}{R}{R}, then you get an emblem with “You may cast copies of the exiled card.”

When Cryptolabe enters, exile your hand and the top card of your library. You may play cards exiled this way for as long as they remain exiled.
{T}: Add {G}{U}. This mana can't be spent to cast spells from your hand.

Integrate each nontoken creature you don't control with power 2 or less.

Whenever you attack, if Cursed Claymore entered the battlefield this turn, attach it to target attacking creature.
Equipped creature gets +2/+1. As long as equipped creature is a Ruin, it's a creature in addition to its other types.
Equip {2}

Flash
Whenever you cast a spell during an opponent's turn, scry 1 and put a +1/+1 counter on Cutthroat Kallukah.

Deathtouch
Ward—Pay 4 life.
Whenever Cybele of the Frozen Faith deals combat damage to a player, you may skip your next turn. If you do, at the beginning of your next turn's upkeep, each opponent discards their hand, you draw seven cards, then put seven +1/+1 counters on Cybele.

Untap all lands you control. Until end of turn, they become 1/1 Elemental artifact creatures with vigilance, indestructible, and haste in addition to their other types.

If an effect would create one or more tokens under your control, it creates twice that many tokens instead.
Tap six untapped artifacts, creatures, and/or lands you control: Double the number of each kind of counter on each permanent you control.

When D'Enzo Orsino enters the battlefield, you may search your library for a card named Marie Laurent, a card named Hans Nehmann and a card named Diago Maldovo, reveal them, put them into your hand, then shuffle.
Prevent all combat damage that would be dealt to legendary Allies you control.

Search your library for a nonblack card, reveal it, put it into your hand, then shuffle.
Create a Treasure token.

Flash
Daggertooth Keelah can't block unless it entered the battlefield this turn.
{1}{B}, Exile a permanent card from your graveyard: Daggertooth Keelah gains indestructible until end of turn.

Hexproof
When Dakran Shipcrusher enters the battlefield, you may bless target creature.

Vigilance
Whenever Dark Ambassador attacks, exile up to one target creature, then return that card to the battlefield tapped under its owner's control.

Deathtouch
{2}, Discard Darkhunt Pesanta: Search your library for a basic Swamp card, reveal it, put it into your hand, then shuffle.

When Data Weaver enters, integrate the top two cards of target opponent's library.
You may play cards that are integrated onto permanents you control, and mana of any type can be spent to cast them.

Target player discards two cards. Exile their graveyard.