New/Revised Feats and Skills

[Shirokiba]

Attuning is not activate. Your Use Magic device still mentions activate, which if we go off of Use Magic Device, is DC 20 even in combat just to have a chance to activate (which on a Nat 1 prevents you from activating for 24 hours, which yours also mentions) so by activate, do you mean attune? If so, then cool, saves me a bit of trouble. Also, how about adding this spell for summoners

http://www.d20pfsrd.com/magic/all-spells...on-eidolon