Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.)
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
Echo (During your next upkeep after this permanent comes under your control, pay its casting cost or sacrifice it.)
Mountainwalk (If defending player controls a mountain, this creature is unblockable.)
--This card has no flavor text --