Galaxy Dragon

Level 4 LIGHT/Dragon Effect Monster
2000 ATK / 1200 DEF

This card cannot attack directly, and can only attack Dragon-Type monsters. If this card battles a Dragon-Type monster, this card gains 1000 ATK during the Damage Step only, also that monster has its effects negated during this Battle Phase, as long as this card remains face-up on the field.

Rulings – Yugipedia

Printings:

Primal Origin: PRIO-EN098 (Common) - 2014-05-16
2015 Mega-Tin Mega Pack: MP15-EN057 (Common) - 2015-09-17
OTS Tournament Pack 2: OP02-EN019 (Common) - 2016-07-15

Prices:

Cardmarket: 0.09 €
TCGplayer: $ 0.19