Xiangsheng Magician

Level 4 LIGHT/Spellcaster Pendulum Effect
500 ATK / 1500 DEF

[ Pendulum Effect ]
Once per turn: You can target 1 face-up Xyz Monster you control, and 1 Level 5 or higher monster you control; that Xyz Monster's Rank becomes equal to the Level of that Level 5 or higher monster, until the end of this turn (even if this card leaves the field). While you control more cards than your opponent does, this card's Pendulum Scale becomes 4.

[ Monster Effect ]

Your opponent takes no battle damage from attacks involving this card. Once per turn: You can target 1 other face-up monster you control; this card's ATK becomes equal to that monster's current ATK, until the end of this turn.

Rulings – Yugipedia

Printings:

Clash of Rebellions: CORE-EN004 (Super Rare) - 2015-08-06
2016 Mega-Tin Mega Pack: MP16-EN050 (Super Rare) - 2016-09-01
Star Pack Battle Royal: SP17-EN018 (Common) - 2017-03-09
Star Pack Battle Royal: SP17-EN018 (Starfoil Rare) - 2017-03-09

Prices:

Cardmarket: 0.13 €
TCGplayer: $ 0.25