Advanced format ruling
Sea Dragon Lord Gishilnodon
Card effect (current official text)1 Tuner + 1 Level 3 non-Tuner monster
When a face-up Level 3 or lower monster on the field is sent to the Graveyard, this card's ATK becomes 3000 until the End Phase of this turn.
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.