When Krasis Watering Hole enters the battlefield, put three +1/+1 counters on it.

: Add

to your mana pool.
Remove a +1/+1 counter from Krasis Watering Hole,

: Add

or

to your mana pool.



: Krasis Watering Hole becomes a 2/2 blue and green Beast creature with trample until end of turn.
For Challenge # 137. Jack hit on a good idea with Starlit Abyss. I riffed off it and made this. Though, I admit, the card makes Timmy unhappy. Maybe activating the colorless ability should add +1/+1 counters instead...