Tengu format ruling
Mage Power
Card effect (current official text)The equipped monster gains 500 ATK and DEF for each Spell/Trap Card you control.
Rulings
- Mage Power includes itself, Field Spell Cards on your side of the field, and monsters acting like Equip Spell Cards, such as Union Monsters.
- If you control Cannon Soldier equipped with Mage Power, and you activate Limiter Removal, then the ATK of Cannon Soldier is (1400 + 500 + 500) x 2 = 4800.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.