Flying When Carrier Familiar enters, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)
“I'll warn you not to try anything with Amleth and Devonport's negotiations while outnumbered.” —Letter from Conway to Wormwood
Flying Whenever Carrier Pigeon attacks or blocks, target creature gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)
“When day and night combine with blight, its prey unites with blood and wight.” —The Lost Verse III
Flying When a creature you control scavenges Carrion Courier, put a flying counter on that creature. Scavenge {2}{B}({2}{B}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)
When Carrion Sculptor enters, create a 2/2 black Zombie creature token. {2}{B}, Sacrifice a creature: Return target creature card from your graveyard to your hand. {1}{B}, Exile Carrion Sculptor from your graveyard: Create a tapped 2/2 black Zombie creature token.
When Carrion Scythe enters, if you cast it, you may return target creature card from your graveyard to the battlefield, then attach Carrion Scythe to it. Equipped creature gets +1/+1 and has deathtouch. Equip {2}
{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.
Glitch {1}(Remove one [restriction] for each time you pay the glitch cost.) Each opponent loses 3 life, discards a card, sacrifices a creature, then sacrifices a land. [You lose 3 life.] [Discard a card.] [Sacrifice a creature.] [Sacrifice a land.]
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.
If a source would deal damage to a creature in Cascading Zhenzu's pack, prevent 1 of that damage. (Two or more creatures you control with equal power are in a pack.) {U}: You may switch Cascading Zhenzu's power and toughness until end of turn.
Wander {2}{W}{W}(You may cast this from the battlefield for its wander cost.) [–1]: Create a 1/1 white Bird creature token with flying or a 2/2 black Cat creature token. [–2]: If a permanent entering the battlefield under your control this turn causes an ability of a permanent you control to trigger, that ability triggers an additional time. [–3]: Put a +1/+1 counter on each creature you control.
Flash When Cast Out enters, exile target nonland permanent an opponent controls until Cast Out leaves the battlefield. Cycling {W}({W}, Discard this card: Draw a card.)
Reveal cards from the top of your library until you reveal a card with a lesser mana value than the previous card, then put all cards revealed this way into your hand.