Verdant Force

Creature — Elemental    (CMC:8)

At the beginning of each upkeep, put a 1/1 green Saproling creature token onto the battlefield.

Burl, scurf, and bower Birth fern and flower.

202 TPR • ENDiTerlizzi

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Legal in: Pioneer,Modern,Legacy,Vintage,Commander

Oracle Text (click to copy):

10/4/2004
Verdant Force's controller gets the tokens. That is the controller at the beginning of upkeep.
8/1/2005
Once created, the tokens are independent of Verdant Force.  If Verdant Force changes controllers, the new controller will put tokens onto the battlefield, but existing tokens will stay where they are.
5/1/2006
In Two-Headed Giant, triggers only once per upkeep, not once for each player.