Naga of the Runes

Indestructible
Rune Constructor (Whenever a creature enters the battlefield runes are collected as long as this card is in the game. Whenever this card is out on the battlefield, rune counters are spent to make a copy of an artifact or enchantment that is on the battlefield or in any graveyard or exile.)
If Naga is removed in anyway from the battlefield, sacrifice two rune counters to keep Naga on the battlefield.