Emet-Selch of the Third Seat 


Legendary Creature — Elder Wizard
Spells you cast from your graveyard cost {2} less to cast.
Whenever one or more opponents lose life, you may cast target instant or sorcery card from your graveyard. If that spell would be put into your graveyard, exile it instead. Do this only once each turn.
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Cards that do something similar expected a card that isn't here?
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Norman Osborn // Green Goblin 100%
$18.99#5662
"Spells you cast from your graveyard cost {2} less to cast."
Council of the Absolute 88%
$0.31#23991
"Spells with the chosen name you cast cost {2} less to cast."
Locket of Yesterdays 86%
$2.30#7553
"Spells you cast cost {1} less to cast for each card with the same name as that spell in your graveyard."
Focus the Mind 86%
$0.24#9855
"This spell costs {2} less to cast if you've cast another spell this turn."
Rally the Monastery 86%
$0.25#12529
"This spell costs {2} less to cast if you've cast another spell this turn."
Cunning Nightbonder 84%
$0.30#10243
"Spells with flash you cast cost {1} less to cast and can't be countered."
Gigastorm Titan 83%
$0.12#23676
"This spell costs {3} less to cast if you've cast another spell this turn."