Thicket Basilisk

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

Blanchwood Armor

Enchant creature
Enchanted creature gets +1/+1 for each Forest you control.

Venom

Enchant creature
Whenever enchanted creature blocks or becomes blocked by a non-Wall creature, destroy the other creature at end of combat.

Rod of Ruin

{3}, {T}: Rod of Ruin deals 1 damage to any target.

Giant Spider

Reach (This creature can block creatures with flying.)

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets +0/+2 and has reach. (It can block creatures with flying.)

Killer Bees

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

Elven Riders

Elven Riders can't be blocked except by Walls and/or creatures with flying.

Giant Growth

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

Stream of Life

Fungusaur

Whenever Fungusaur is dealt damage, put a +1/+1 counter on it.

Forest

Wall of Brambles

Defender (This creature can't attack.)
{G}: Regenerate Wall of Brambles.