Gnarl, Horde Master

When Gnarl, Horde Master enters the battlefield,
you may search your library for either card
named "The Overlord of Evil" or "The Overlord"
and put the chosen card into your hand, If you
already have either named card in the battlefield,
you may instead give the chosen card hexproof
and indestructible until the start of your next
turn.
Minion creature tokens you control get +1/+1.