Elvish Guidance 
Enchantment — Aura
Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional for each Elf on the battlefield.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL