Alna, Frozen Mother

0: PASSIVE: All players other than you can only untap half of their tapped permanents on their untap steps.
+2: Deal X damage to target player where X is equal to the number of tapped permanents that player controls.
-10: Tap all permanents all players control, other than your planeswalkers. Tapped permanents don't untap during their owner's next untap step