Firebolt

(S can be paid with one mana from a snow source.)

Activated abilities of artifacts can't be activated.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Suspend 4—G (Rather than cast this card from your hand, pay G and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.) Create two 4/4 green Rhino creature tokens with trample.

If it's not your turn, you may exile a red card from your hand rather than pay this spell's mana cost. Create two 3/1 red Elemental creature tokens with trample and haste. Sacrifice those tokens at the beginning of your next upkeep.

When this creature enters, discard two cards, then draw two cards. For each nonland card discarded this way, create a 1/1 red Elemental creature token. 3RR, Exile this card from your graveyard: Create two 1/1 red Elemental creature tokens.

Exile target creature you don't control. For each creature exiled this way, its controller searches their library for a basic land card. Those players put those cards onto the battlefield tapped, then shuffle. Overload 4WW (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Counter target creature spell. Draw a card.