Stellarknight Alpha

Equip Spell

Equip only to a "tellarknight" monster you control. It gains 500 ATK and DEF, also it is unaffected by your opponent's card effects. If you control a face-up monster that is not a "tellarknight" monster, destroy this card.

Rulings – Yugipedia

Printings:

Duelist Alliance: DUEA-EN057 (Common) - 2014-08-14
2015 Mega-Tin Mega Pack: MP15-EN101 (Common) - 2015-09-17

Prices:

Cardmarket: 0.04 €
TCGplayer: $ 0.13