Pentarch Ward 
Enchantment — Aura
Enchant creature As this Aura enters, choose a color. When this Aura enters, draw a card. Enchanted creature has protection from the chosen color. This effect doesn't remove this Aura.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL