Nova Chaser 
Creature — Elemental Warrior
$2.67 #19762 0.00 18.9 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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"If a triggered ability of another Elemental you control triggers, it triggers an additional time."
Flamekin Bladewhirl72%
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"As an additional cost to cast this spell, reveal an Elemental card from your hand or pay ."
."
Champion of the Path70%
$0.41↓#7111↑0.000.6 years↓
"Whenever another Elemental you control enters, it deals damage equal to its power to each opponent."