Perret Hearthsong

All creatures able to block Perret Hearthsong do
so.
Whenever a creature enters the battlefield under
your control, it inspires, then Perret Hearthsong inspires. (Reveal the top card of your library. Put
that card into your hand if it's an Aura or a creature. Otherwise, that creature gains haste, then put the
card back or put it on the bottom of your library. Then repeat this process for this creature.)