Slaughter Pact

Destroy target nonblack creature.
At the beginning of your next upkeep, pay {2}{B}. If you don't, you lose the game.

Llanowar Tribe

Djinn Illuminatus

({U/R} can be paid with either {U} or {R}.)
Flying
Each instant and sorcery spell you cast has replicate. The replicate cost is equal to its mana cost. (When you cast it, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)

Counterspell

Glimpse of Nature

Whenever you cast a creature spell this turn, draw a card.

Forest

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Llanowar Elves

Unwind

Counter target noncreature spell. Untap up to three lands.

Condescend

Counter target spell unless its controller pays {X}. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Venerated Rotpriest

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Whenever a creature you control becomes the target of a spell, target opponent gets a poison counter.

Worldly Tutor

Search your library for a creature card, reveal it, then shuffle and put the card on top.