Sound Barrier

Indestructible, Hexproof
When Sound Barrier enters the battlefield, add
12 music counters onto it.
Creatures you control gain +0/+X and Ward Y,
where X is the number of music counters on
Sound Barrier and Y is half the number of music counters on Sound Barrier, rounded down.
At the beginning of each upkeep, remove 2 music counters from Sound Barrier. If Sound Barrier
would have no music counters on it, sacrifice it.