There is a Legacy version
here.
Current Spell [one-action] Feat 8*Concentrate Druid Spellshape Source Player Core pg. 131 2.0Archetype Elementalist* This version of the Current Spell feat is intended for use with an Archetype and has a different level for access than the
original feat.
As you use your magic to manipulate air or water, you spin off some of its currents to form a barrier around you. If your next action is to Cast a Spell with the air or water trait, until the start of your next turn, you gain a +1 circumstance bonus to AC or a +2 circumstance bonus against ranged attacks. This effect has the air or water trait, or both, depending on the traits of the spell you cast. You also gain a +1 circumstance bonus to all saves against effects with the air trait, water trait, or both until the start of your next turn, depending on the spell’s traits.
Archetype Use
This feat can be used for one or more Archetypes in addition to the listed Classes. When selected this way, the feat is not considered to have its class traits.
Traits
Concentrate: An action with this trait requires a degree of mental concentration and discipline.
Spellshape: Actions with the spellshape trait tweak the properties of your spells. You must use a spellshape action directly before casting the spell you want to alter. If you use any action (including free actions and reactions) other than casting a spell directly after, you waste the benefits of the spellshape action. The benefit is also lost if your turn ends before you cast the spell. Any additional effects added by a spellshape action are part of the spell's effect, not of the spellshape action itself.