Cocytus, Guardian of the Fifth

Indestructible: (This creature can’t be destroyed by damage or effects.)
Commander (EDH Compatible): Cocytus can be your commander.
Trample, Deathtouch: (Excess combat damage dealt to the player or planeswalker is carried over. Any amount of damage this deals to a creature is enough to destroy it.)
Martial Mastery: Whenever Cocytus deals combat damage to a player, you may search your library for an Equipment card, reveal it, and put it into your hand. Then shuffle your library.
Aura of Frost: Creatu