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 removes the top four cards of his or her library from the game. If two or more of those cards have the same name, repeat this process.¹
Illus. Mark Tedin

Crystal Keep Rulings Summaries

• The "repeat this process" means to repeat as often as it takes to not get a matching pair. [D'Angelo 2003/02/16]

Format Legality	Legal in Vintage, Legacy, Extended, Standard
Printings (2/15)	Tenth Edition (Rare) Judgment (Rare)