Phyrexian colosseum

Hexproof
This artifact can be searched for as though it were
a creature.
Each player chooses an opponent. You and the
chosen opponent each put 5 creatures you control
face down in any order. Reveal all creatures simul-
taneously. Each revealed creature fights the creature
opposite it.The play who won more fights gains 4
life, draws 4 cards, and adds 8 mana