Radagast the Brown New Stock cast it for its madness

cast it for its madness cost or put it into your graveyard

When that mana is spent to cast an instant or sorcery spell

(Whenever equipped creature becomes the target of a spell or ability an opponent controls

choose a creature or planeswalker card in that player's graveyard

Whenever you cast a spell that's one or more colors

Radagast the Brown New Stock cast it for its madnessWhenever Radagast or another nontoken creature you control enters, look at the top X cards of your library, where X is that creature's mana value. You may reveal a creature card that doesn't share a creature type with a creature you control from among those cards and put it into your hand. Put the rest on the bottom of your library in a random order.