Devouring Rage 

Instant — Arcane
$0.14 #26540 0.00 22.1 years
As an additional cost to cast this spell, you may sacrifice any number of Spirits.
Target creature gets +3/+0 until end of turn. For each Spirit sacrificed this way, that creature gets an additional +3/+0 until end of turn.
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Devouring Greed96%
$0.11↓#16847↑0.11↑22.1 years
"As an additional cost to cast this spell, you may sacrifice any number of Spirits."
+1 more matching line
Unchecked Growth78%
$0.18↑#242310.0021.7 years
"Target creature gets +4/+4 until end of turn. If it's a Spirit, it gains trample until end of turn."
Vicious Betrayal77%
$0.20↑#289460.16↑22.4 years
"Target creature gets +2/+2 until end of turn for each creature sacrificed this way."
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Thalia's Geistcaller74%
$0.25↑#218340.007.2 years↓
"Sacrifice a Spirit: This creature gains indestructible until end of turn."
Sekki, Seasons' Guide74%
$1.59↑#18616↑0.24↑21.4 years
"Sacrifice eight Spirits: Return this card from your graveyard to the battlefield."
Supernatural Rescue72%
$0.10↓#250700.31↑4.9 years↓
"This spell has flash as long as you control a Spirit."
Apothecary Geist72%
$0.05↓#245470.0010.5 years↓
"When this creature enters, if you control another Spirit, you gain 3 life."
Dreamcatcher72%
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"Whenever you cast a Spirit or Arcane spell, you may sacrifice this creature. If you do, draw a card."
Wicked Reward71%
$0.09↓#300910.22↑30.0 years↑
"Target creature gets +4/+2 until end of turn."
+1 more matching line
Rattlechains70%
$0.31↑#10648↑0.13↑10.5 years↓
"You may cast Spirit spells as though they had flash."
+1 more matching line