Bubbles

Flying, Bubbles gains Indestructible, Menace, Annihilator 2, and +4/+4 when attacking.

When Bubbles enters the battlefield target opponent discards a card from their hand and reduces their
max hand size by 1.

{t}{3}{c}{c}{c}, If Slingshot is on the battlefield you
may Exile Bubbles and return him to your battlefield tapped.