Elastic Net

Spread your limbs into a flexible web. Hostile creatures of your choice in the emanation treat the area as difficult terrain. When a creature enters the area for the first time on a turn or starts there, it must make a STR save or become grappled until the start of its next turn.

This power has its own stable page so it can be linked from any character, item, location, story post, bargain, curse, or future reward.