Look at the top eight cards of your library. You may put a creature card from among them onto the battlefield and exile an instant or sorcery card from among them. Put the rest on the bottom of your library in a random order. As long as that creature is on the battlefield, whenever it deals combat damage to a player, copy the exiled card and you may cast the copy without paying its mana cost.
You may put a green creature card with mana value 4 or less from your hand onto the battlefield. Ferocious — If you control a creature with power 4 or greater, that creature enters with two +1/+1 counters on it.
Search your library for a Demon card or a black card with mana value 6 or greater, reveal it, put that card in your hand, then shuffle.
“It's not nice to keep evil waiting. If they weren't going to devour your soul earlier, they're certainly thinking about it now.” — Filbertine, Emissary
When Ion Field enters, target player creates two 1/1 red Elemental creature tokens. Whenever you cast an instant or sorcery spell that targets only one target, you may pay {1}{R}{R} and sacrifice Ion Field. If you do, copy that spell for each other target it could target. Each copy targets a different one of those targets.
Other Vampires you control get +1/+1. Whenever Irascible Bloodwitch or another Vampire enters under your control, Irascible Bloodwitch deals 1 damage to any target.
“I didn't think you had a heart left to break.” —Makodonis
If you've lost life this turn, you may cast this spell as though it had flash. Irate Retribution deals X damage to each creature and each planeswalker. You gain X life.
“I'm perfectly willing to hold this class late. Are you?” — Professor Shayle
Codex — Little Pig; Charging Cassowary; The Lonely Hunter; Shadowlurk; Blood Constrictor. (As this enters, conjure its contents into a shuffled face-up additional library.) You may cast Adventures of this codex's contents from your graveyard.
“They're not all going to make it, but I'll keep them alive as best as one can.”
[+1]: Create a tapped 3/3 black Crocodile creature token with menace. [–1]: You may cast a copy of Size Up. [–7]: Each land you control becomes a 3/3 Crocodile creature and gains menace and haste until end of turn.
Choose one — • Ire of Ancient Tomes deals 2 damage to any target. • Target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.
Flying (This creature can't be blocked except by creatures with flying or reach.) When Iridescent Familiar enters, if you control another creature with flying, draw a card.
Flying, lifelink Whenever another creature you control attacks, until end of turn, that creature gets +2/+0 if it's red, +0/+2 if it's green, gains lifelink if it's white, and gains flying it if it's blue.
Flash Deathtouch, lifelink Whenever Irika, Wielder of Secrets deals combat damage to a player, you may pay {U/B}. If you do, you draw a card and you lose 1 life.
“Having power like this and not using it would be a crime. But not the good type of crime. The boring type.”
Indestructible As long as your devotion to red and white is less than seven, Iroas isn't a creature. Other creatures you control have first strike. Whenever you attack for the first time each turn, untap all other creatures you control. After this phase, there is an additional combat phase.
Target creature you control deals damage equal to its power to another target creature. Agonize (You may cast this card from your graveyard by putting a -1/-1 counter on a creature you control in addition to paying its other costs. Then exile this card.)
Iron Warden enters with two -1/-1 counters on it. When Iron Warden dies, you may put its -1/-1 counters on target creature. {R}: Iron Warden gets +1/+0 until end of turn.