Miku, Sparked Spirit

This spell costs {1} more to cast for each creature card in all graveyards.
Whenever a card enters your graveyard gain 1 life
and gain a Music token.
If you control 5 or more Music tokens instead gain 3 life.
If you control 20 or more Music tokens create a token copy of the card that entered the graveyard this turn except it loses Legendary.