Watcher, Pure Water

Whenever you Scry a card, Watcher, Pure Water gains one Mantra counter

{u}{u}{u}: Watcher, Pure Water gains Double strike, and gets a 0/-2 counter
{u}{u}{u}: Watcher, Pure Water loses Double strike, and removes a 0/-2 counter
Remove 10 Mantra counters from Watcher, Pure Water: gain {u}{u}{u}, Watcher, Pure Water gets two +2/0 counters.