Panoptic Projektor 
Artifact
$0.30 #9031 0.62 2.6 years
: The next face-down creature spell you cast this turn costs 
less to cast.If turning a face-down permanent face up causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
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Dream Chisel90%
$3.84↑#13566↓0.14↓23.9 years↑
"Face-down creature spells you cast cost 
less to cast."
less to cast."
Kadena, Slinking Sorcerer84%
$0.39↑#12052↓0.41↓7.0 years↑
"The first face-down creature spell you cast each turn costs less to cast."
less to cast."+1 more matching line
Obscuring Aether84%
$0.17↓#11132↓0.12↓11.4 years↑
"Face-down creature spells you cast cost less to cast."
less to cast."
Goblin Maskmaker84%
$0.04↓#21472↓0.25↓2.6 years
"Whenever this creature attacks, face-down spells you cast this turn cost less to cast."
less to cast."
Sumala Sentry76%
$0.11↓#23164↓0.50↓2.6 years
"Whenever a face-down permanent you control is turned face up, put a +1/+1 counter on it and a +1/+1 counter on this creature."
Mirror Room // Fractured Realm75%
$2.34↑#2792↑0.26↓1.9 years
"If a triggered ability of a permanent you control triggers, that ability triggers an additional time."
Salt Road Ambushers75%
$0.10↓#11980↓0.75↑11.4 years↑
"Whenever another permanent you control is turned face up, if it's a creature, put two +1/+1 counters on it."
Growing Dread74%
$0.19↓#107580.11↓1.9 years
"Whenever you turn a permanent face up, put a +1/+1 counter on it."
Aven Farseer74%
$0.08↓#29780↓0.31↓23.3 years↑
"Whenever a permanent is turned face up, put a +1/+1 counter on this creature."
Mastery of the Unseen74%
$0.14↓#16472↓0.28↓11.6 years↑
"Whenever a permanent you control is turned face up, you gain 1 life for each creature you control."
Yarok, the Desecrated73%
$0.34↑#2470↑0.727.2 years↑
"If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time."
Trail of Mystery72%
$0.10↓#5739↑0.18↓11.9 years↑
"Whenever a permanent you control is turned face up, if it's a creature, it gets +2/+2 until end of turn."
Secret Plans70%
$0.20↓#86560.44↓11.9 years↑
"Whenever a permanent you control is turned face up, draw a card."