Bonds

You and willing creatures of your choice are bound together by the threads of fate. For the duration, the targets gain a bonus to attack rolls, saving throws, and ability checks equal to twice the number of currently bonded creatures (minimum +4, maximum +10). The targets must maintain concentration, as though they were concentrating on a spell, to maintain the bond and receive its effects.

If the number of bonded creatures is 6 or more, the targets gain an additional +1 bonus to their AC for each bonded creature above 5 (maximum +5).