Savaging Troll

Haste
Savaging Troll attacks each turn if able.
As long as Savaging Troll is an attacking creature,
you may put an Ursine Influence counter on
target blocking creature, you may use this ability
once each turn. (You gain control of a creature with
a number of Ursine Influence Counter equal or bigger
than the converted mana cost of that creature, it is a
snow permanent in addition to its other type)