Oracle

Plane - Belenon 

If a creature you control would untap during your untap step, put two +1/+1 counters on it instead.
Whenever you roll Chaos, untap each creature you control.

Officiele rulings

6/1/2012
While Edge of Malacol is face up, the normal turn-based action of untapping your creatures is replaced. Those creatures won’t untap. Other tapped permanents you control will untap as normal.

6/1/2012
Other spells and abilities can untap creatures as normal. In that case, they’ll just untap. You won’t put any +1/+1 counters on them.

6/1/2012
If you untap a creature you control during another player’s untap step (perhaps due to Seedborn Muse’s ability), that creature will untap normally. You won’t put any +1/+1 counters on it.

Decktips