Bituin, The Shooting Star

Hexproof
When Bituin enters the battlefield each player
creates a colorless artifact token named Asteroid
with "{t}, Sacrifice Asteroid: You lose life equal to
the number of tokens you control named Asteroid
plus two"
If Bituin is attacking an opponent with an
Asteroid token, he gains Flying and +1/0 for each Asteroid token they control. Then, defending
player creates an Asteroid token.