Vigilance

Whenever Elf of Forgotten Ways attacks and isn't blocked you may pay {2} if you do each player may search their library for a nonswamp nonplains land and put it onto the battlefield tapped.

Whenever a nonswamp nonplains land enters the battlefield that lands controller creates a 1/1 White and Green Elf creature token.

When Elf of Forgotten Ways dies gain control of all elf creatures.