Arms of the great Ent

A portal to the Fey wilds opens around your target(s) and wooden tendrils fly out, entangling your victim. The creature must succeed on a dexterity saving throw or  take 1d8 piercing damage and become restrained and incapacitated (the saving throw now becomes a strength save). For every round the creature remains chained, the DC increases by two, as the tendrils consumes the creatures strength.