O-Tera, Storm Celestial

O-Tera can be your commander.
At the beginning of each upkeep choose one at
random-
• Creatures get -2/-2 until end of turn.
• Creatures get +1/+1 until end of turn.
• Each player chooses a creacher they control at
random. O-Tera deals 5 damage to each of those creatures.
{bull} Each player returns a creature they control
chosen at random to their owner's hands.