Song of Heroes

Bardic song
Recharge, 11+ after battle
Action: 
Quick action each turn; 11+ to sustain
Opening & Sustained Effect: 

You and your nearby allies gain a +1 attack bonus until the start of your next turn.

Final Verse: 

 The effect ends immediately, but one ally of your choice gains a +2 bonus to their next attack roll this battle.

3rd Level Spell: 
The effect also provides a +1 bonus to saves.
5th Level Spell: 
Sustain the song on a 9+
7th Level Spell: 
Recharge check is now 6+
9th Level Spell: 
The effect also provides a +1 bonus to MD