Bri Synchron

Level 4 EARTH/Machine Tuner Monster
1500 ATK / 1100 DEF

If this card is sent to the Graveyard as a Synchro Material, until the end of this turn, the Synchro Monster that used this card as a Synchro Material gains 600 ATK, but its effects are negated.

Rulings – Yugipedia

Printings:

Duelist Pack: Yusei 3: DP10-EN014 (Ultra Rare) - 2011-01-21
Legendary Collection 5D's Mega Pack: LC5D-EN019 (Common) - 2014-10-23

Prices:

Cardmarket: 0.39 €
TCGplayer: $ 0.42