Hedron Matrix

Artifact — Equipment - (rare)

Equipped creature gets +X/+X, where X is its mana value.
Equip 

The hedrons awoke along with the Eldrazi, forming superstructures that radiated overwhelming magic.

Price

cardkingdom 0.59

cardsphere 0.56

manapool 0.4

tcgplayer 0.43

cardmarket 0.23