Splintering Wind

[2][G]: Splintering Wind deals 1 damage to target creature. Put a 1/1 green Splinter creature token onto the battlefield. It has flying and "Cumulative upkeep [G]." When it leaves the battlefield, it deals 1 damage to you and each creature you control. (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless he/she pays its upkeep cost for each age counter on it.)