Carefree Performer can't be sacrificed. You may exert Carefree Performer as it attacks. When you do, discard two cards, then draw two cards. (An exerted creature won't untap during your next untap step.)
Caress the Fleets deals 1 damage to each creature. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
“Make no mistake, this was a show of power. If it wanted us dead, we wouldn't be alive to have this conversation.”
Haste Whenever Carnival Daredevil deals combat damage to a player, exile the top card of your library. Duet — You may play cards exiled with Carnival Daredevil as long as you control exactly two tapped creatures.
{3}, {T}: Return target creature card from your graveyard to the battlefield under target player's control. That creature deals damage equal to its power to that player.
{2}, {T}, Sacrifice Cartographer's Chart: Search your library for a land card, reveal it, and put it into your hand, then shuffle. {2}, {T}, Sacrifice Cartographer's Chart: Draw a card.
Vanishing 3 (This permanent enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) Whenever a time counter is removed from a permanent you control, Carve a Path deals 1 damage to any target.
Target attacking creature gets +3/+1 until end of turn. Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
It takes but a single broken rule to throw a million carefully constructed constraints aside.
Casualty of War deals 4 damage to target creature or planeswalker. {2}{R}{R}, Exile Casualty of War from your graveyard: Arm up to two target creatures you control. Activate only as a sorcery. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)
Tithe (When this creature enters, you may tap three other artifacts and/or creatures you control.) When Cataclysmic Preacher's tithe is paid, return target instant or sorcery card from your graveyard to your hand.
Flying, haste When Cataclysmic Skytyrant enters, sacrifice all other non-Dragon creatures you control. For each creature sacrificed this way, create a 3/3 red Dragon creature token with flying.
Return target creature card from your graveyard to your hand. You may trigger a death knell of that card.
“And now whoever, whatever, is left wanders. They don't remember where they belong. They don't even remember if they're alive. But they don't remember the pain, either.” —Mei Liva, to Karina and Flynn
You gain 5 life. Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”) Flashback {2}{G}(You may cast this card from your graveyard for its flashback cost. Then exile it.)
Choose one. If you're horrific, you may choose both instead. (You're horrific as long as you've sacrificed a permanent or discarded a card this turn.) • Destroy target artifact. • Catastrophic Crash deals 3 damage to target creature.