Cockatrice

Flying
Whenever Cockatrice blocks or becomes blocked by a non-Wall creature, destroy that creature at end of combat.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Elvish Archers

Forest

Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Grizzly Bears

War Mammoth

Killer Bees

Flying
{G}: Killer Bees gets +1/+1 until end of turn.

Fissure

Destroy target creature or land. It can't be regenerated.

Fire Elemental

Force of Nature

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of your upkeep, Force of Nature deals 8 damage to you unless you pay {G}{G}{G}{G}.

Keldon Warlord

Keldon Warlord's power and toughness are each equal to the number of non-Wall creatures you control.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Llanowar Elves

Giant Growth

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

Winter Blast

Tap X target creatures. Winter Blast deals 2 damage to each of those creatures with flying.

Uthden Troll

Mountain

Colossus of Sardia

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Colossus of Sardia doesn't untap during your untap step.
{9}: Untap Colossus of Sardia. Activate only during your upkeep.