Kerax, the Splintered Soul

A deck may have any number of cards named
Kerax, the Splintered Soul.
When Kerax, the Splintered Soul enters the battlefield, you may search your library for a card
named Kerax, the Splintered Soul and exile it.
Kerax, the Splintered Soul gets +1/+1 for each
card named Kerax, the Splintered Soul you own
in exile.