In the short feat description, it says "Gain Eldritch Blast 1/encounter"; in the actual text of the feat, though, it says "Pick a pact and gain that pact's at-will power as an encounter power".
Which is it? 'Cause my rogue will find Eyebite a lot more useful than EB.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.