Anointed Peacekeeper 
Creature — Human Cleric
Vigilance
As this creature enters, look at an opponent's hand, then choose any card name.
Spells your opponents cast with the chosen name cost more to cast.
Activated abilities of sources with the chosen name cost more to activate unless they're mana abilities.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL