Nova Chaser 
Creature — Elemental Warrior
$2.67 #20035 0.06 19.0 years
Trample
Champion an Elemental (When this enters, sacrifice it unless you exile another Elemental you control. When this leaves the battlefield, that card returns to the battlefield.)
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Cards similar to Nova Chaser expected a card that isn't here?
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"As an additional cost to cast this spell, reveal an Elemental card from your hand or pay ."
."