Thor, God of Thunder

Flying

Whenever Thor, God of Thunder deals damage to a player, each creature you control gets a +1/+1 counter.

Whenever Thor, God of Thunder gets a +1/+1 counter,
put an ultimate counter on him. When Thor, God of Thunder has five ultimate counters on him, remove him from the battlefield and return him transformed.
—
"Are you Thor, God of Hammers?" -Odin