Scalpelexis

Creature - Beast 1/5, 4U (5)
Flying (This creature can't be blocked except by creatures with flying or reach.)

Whenever Scalpelexis deals combat damage to a player, that player exiles the top four cards of his or her library. If two or more of those cards have the same name, repeat this process.¹
Illus. Mark Tedin

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: The "repeat this process" means to repeat as often as it takes to not get a matching pair.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (2/16)	Tenth Edition (Rare) Judgment (Rare)