Angelic Cub

Lionceau angélique (Angelic Cub) (fr)

Creature - Cat Angel | Power/Toughness: 1 / 1 (CMC 2)
Whenever Angelic Cub becomes the target of a spell or ability for the first time each turn, put a +1/+1 counter on it.
As long as Angelic Cub has three or more +1/+1 counters on it, it has flying.