Prevent all combat damage that would be dealt this turn.

Craw Wurm

Dancing Scimitar

Flying (This creature can't be blocked except by creatures with flying or reach.)

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

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

All Forests are 1/1 creatures that are still lands.

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

Defender (This creature can't attack.)
First strike

Reach (This creature can block creatures with flying.)