Today from Legends of Prestige and Prowess we have two new abjuration spells modeled after the basic 1st-level shield spell. Shield is one of the most powerful 1st-level spells available to sorcerers and wizards and perhaps one of the most powerful spells relative to its spell level in general. Even though these spells are already at a higher cost than the shield spell due to their higher slot level, they also only grant +4 to AC instead of +5 out of bounded accuracy concerns resulting from being able to grant the shield bonus much more easily to clerics, paladins, fighters, etc. who typically achieve higher ACs than a sorcerer or wizard does.