Hunda, Anomaly Colossus

Flash
Hunda, Anomaly Colossus costs {x} less to cast,
where {x} is the number of times a coin has been flipped this turn.
When Hunda enters the battlefield, return up to
three target creatures to their owner's library.
Each player who had a creature returned to their library this way flips a coin. If they win the flip,
they draw a card.