Puresight Merrow
About this card
Puresight Merrow is a creature card in Magic: The Gathering with mana value 2 (color identity: blue and white). First printed in Shadowmoor (2008); 2 paper printings in total. Legal in Commander, Modern, Legacy and Vintage. Cheapest printing: €0.13 (Shadowmoor); most expensive: €0.14 (The List).
Puresight Merrow 

Stripped of his sight, he was free to see only the ideal.
Name in each language
Legality
Rulings
2008-05-01
If the permanent is already untapped, you can’t activate its ability. That’s because you can’t pay the “Untap this permanent” cost.
2008-05-01
If a creature with an ability hasn’t been under your control since your most recent turn began, you can’t activate that ability, unless the creature has haste.
2008-05-01
When you activate an ability, you untap the creature with that ability as a cost. The untap can’t be responded to. (The actual ability can be responded to, of course.)

