Radioactive Slam

Ripple 5 (When you cast this spell, you may reveal
the top five cards of your library. You may cast spells
with the same name as this spell from among those
cards without paying their mana costs. Put the rest on
the bottom of your library.)
Radioactive Slam does 2 damage to any target.
Retrace (You may cast this card from your graveyard
by discarding a land card in addition to paying its
other costs.)