Bioshift

"Its alright if you change your mind. There's always a chance we can rearrange parts later."

In reaction to yourself or a teammate being targeted or attacked, you grant a brief, but necessary, body modification to help. 

Target creature that you can see, yourself included, gains a drastic body modification of your choice until the start of their next turn:

• Rough, protective scales forming over all of their skin: +1 to AC
• Arms replaced by large, feathery wings: Resistance to spell damage
• Legs replaced by 8 spider legs: double AC against projectiles

Using spell slots higher than 1st level increase the possible number of targets by 1 for each spell slot level used.