MTG >Combos >Cloudstone Curio +Llanowar Elves +Concordant Crossroads +Fyndhorn Elves +

with

Cloudstone Curio

,

Llanowar Elves

,

Concordant Crossroads

and on the battlefield and

Fyndhorn Elves

in your hand. 1-

Llanowar Elves

adding to your mana pool 2- cast return

Llanowar Elves

to your hand 3-

Fyndhorn Elves

adding to your mana pool 4- Cast

Llanowar Elves

and repeat.