
Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
: Add
. Target opponent gains control of this creature. (Activate only as an instant.)
Illustrated by Kev Walker · Urza's Saga · #169
2008-04-01
Because the ability is targeted, it is not a mana ability. It can only be activated when you have priority, and goes on the stack like other non-mana abilities.