Beatlzebuzz

Flying, trample
Whenever Beatlzebuzz deals damage to a player,
put a +1/+1 counter on it. If it is mounted by a legendary creature, it gains deathtouch and indestructible.
Mount {2} (If this card isn't mounted, tap and attach
a creature you control to it with less power. It remains tapped for as long as it's attached. This becomes
a creature and gains its abilities.)