Webium's Emissary

Whenever you cast a black, red, or blue spell, you may scry 3. If you do, reveal the
top card of your library. If that card is an instant or sorcery and has a converted mana cost of 5 or less, exile that spell and cast is at any time without paying its mana cost. If not, put it into your graveyard.
{4}, {t}: Scry 7.