Merlin, Affectionate Pup

Whenever a creature enters, choose one:
Lick - Gain 1 life.
Bark - Tap target permanent.
Bite - Target opponent loses 1 life.

Playful {dash} When choose a number of modes for
a spell or ability you control, you may instead choose one or more modes if you have Licked, Barked and Bitten this turn. You can't choose any mode more than once.