Layla, the Ever-Playful

Indestructible, Haste

When Layla, the Ever-Playful attacks an opponent.
You and the opponent exile the top card of each of
your libraries with a fetch counter on it.
Cards with fetch counters on them may be played
by their owners.

Whenever a card with a fetch counter is cast or put
into play, put a +1/+1 counter on Layla, the Ever-Playful