Heliosphere Dragon

Level 4 LIGHT/Dragon Effect Monster
0 ATK / 1900 DEF

While your opponent has 4 or less cards in their hand and this card is the only monster you control, your opponent cannot declare an attack. Once per turn, if you control a Level 8 Dragon-Type monster: You can make this card become Level 8 until the end of this turn.

Rulings – Yugipedia

Printings:

Primal Origin: PRIO-EN004 (Common) - 2014-05-16
2015 Mega-Tin Mega Pack: MP15-EN004 (Common) - 2015-09-17

Prices:

Cardmarket: 0.09 €
TCGplayer: $ 0.15