Cockatrice

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

Argothian Pixies

Argothian Pixies can't be blocked by artifact creatures.
Prevent all damage that would be dealt to Argothian Pixies by artifact creatures.

You may choose not to untap Zelyon Sword during your untap step.
{3}, {T}: Target creature gets +2/+0 for as long as Zelyon Sword remains tapped.

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

{1}, {T}, Sacrifice Aeolipile: It deals 2 damage to any target.

Flying
{G}{G}: Emerald Dragonfly gains first strike until end of turn.