Miku, Shady Surgeon

When Miku, Shady Surgeon enters the battlefield heal for 2 times {x}
Lose 3 health: choose any number of opponents to deal 1 damage to. For each opponent not chosen you may put a +1/+1 counter on Miku, Shady Surgeon.
Whenever you gain life, if you control 15
or more Music tokens, heal an additional
amount equal to the amount
of artifacts you control.

"Don't flinch"