14 cards where the artist name includes “efrem palacios”

Contagious Nim (Scars of Mirrodin #58)
Garruk's Companion (Magic 2011 #176)
Gruul Signet (Commander 2016 #256)
Lead the Stampede (Mirrodin Besieged #82)
Ogre Resister (Mirrodin Besieged #72)
Plague Myr (Mirrodin Besieged #125)
Shriek Raptor (New Phyrexia #24)
Slice in Twain (Scars of Mirrodin #127)
Snapsail Glider (Scars of Mirrodin #203)
Steady Progress (Scars of Mirrodin #45)
Sword of Feast and Famine (Magic Online Promos #59683)
Tail Slash (Dragons of Tarkir #161)
Thrummingbird (Scars of Mirrodin #47)
Tread Upon (Dragons of Tarkir #211)

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