Mischievous Mouse Totem

Indestructible
Beginning of your upkeep, both randomly choose
an opponent, & a non-land permanent that player controls. Mouse Totem becomes a aura attached
to that permanent, loses all other abilities except
this one. It now is a Indestructible 0/1 mouse.
If that player loses control of enchanted
permanent, return Mouse Totem to the battlefield under your control and it gains haste.