Infected Vermin
{2}{B}
Creature -- Rat
1/1
{2}{B}: ~this~ deals 1 damage to each creature and each player.
Threshold -- {3}{B}: ~this~ deals 3 damage to each creature and each player. Activate only if seven or more cards are in your graveyard.
Krosan Avenger
{2}{G}
Creature -- Human Druid
3/1
Trample
Threshold -- {1}{G}: Regenerate ~this~. Activate only if seven or more cards are in your graveyard.
Nantuko Monastery
Land
{T}: Add {C}.
Threshold -- {G}{W}: ~this~ becomes a 4/4 green and white Insect Monk creature with first strike until end of turn. It's still a land. Activate only if seven or more cards are in your graveyard.