Dragonskin

You say nothing, but make the motions in the prescribed pattern and hold the dragon's scale aloft. Your flesh erupts with hard, colorful scales.

Your skin toughens and becomes scaly like that of a chromatic dragon, of a color that you select. You gain a bonus to your armor class if you are not wearing any armor +3, as well as resistance against the type of energy appropriate to the color you select: acid (black), green (poison), cold (white), lightning (blue), or fire (red).

At Higher Levels. When you cast this spell using a spell slot of 5th level and every other spell slot level afterwards. Increase your bonus to AC by 1 for each applicable spell level.