Holtzman Shield

Pay {2} to equip to target Human creature.
Equipped creature has Indestructible.
If equipped creature is dealt combat damage by a creature equipped with the Lasgun, destroy
attacking creature and Lasgun, then sacrifice
Holtzman Shield and the creature it is equipped
to. You then reveal the top card of your library.
If it is a land, destroy all lands. If it is a creature, destroy all creatures.