Tempore Turris

When cast, the spell builds a 10 ft tall 5 ft wide field of fortified particals gathered from shattered defensive structures from different places in Time to protect yourself. For the spell's duration, when an atack is aimed against you, you can use your reaction to gain 5 AC bonus until the the end the attacker's turn. You also gain 2 x Character level Maximum Hit Points for the spell's duration.

The spell ends if you lose concentration or if you fall unconscious.