Weakness

Enchant creature
Enchanted creature gets -2/-1.

Ironroot Treefolk

War Mammoth

Grizzly Bears

Giant Spider

Reach (This creature can block creatures with flying.)

Scryb Sprites

Lifeforce

Mox Jet

Sol Ring

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Bog Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Drudge Skeletons

{B}: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Swamp

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Giant Growth

Target creature gets +3/+3 until end of turn.

Forest

Mox Pearl

Paralyze

Enchant creature
When Paralyze enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player may pay {4}. If the player does, untap the creature.