Leyline Immersion 
Enchantment — Aura
Enchant legendary creature
Enchanted creature has ward 
and "
: Add five mana in any combination of colors. Spend this mana only to cast spells."
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL