Boo, Curtain Climber

Haste, Menace
You may pay an additional {2} and cast this
spell as an instant.
On your upkeep, you may add a catnip token
to Boo, Curtain Climber.
Remove five catnip counters: Boo, Curtain Climber gains +2/+2 and deathtouch until
your next turn.