Advanced format ruling
Heart of Clear Water
Card effect (current official text)If the equipped monster's ATK is 1300 or higher, this card is destroyed. The monster equipped with this card is not destroyed as a result of battle or by the effect of a card that targets the monster. (Damage calculation is applied normally.)
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.