Edison format ruling
Tethys, Goddess of Light
Card effect (current official text)When you draw a Fairy monster(s) (except during the Damage Step): You can reveal 1 of those monsters; draw 1 card. This card must be face-up on the field to activate and to resolve this effect.
Rulings
(1) When you draw a Fairy-Type monster(s), you can reveal 1 of those monsters to draw 1 more card.
- This (1) optional Trigger Effect activates & resolves on the field.
- 1 Fairy-Type monster you JUST drew is revealed to your opponent at activation.
- This effect can be activated during the Damage Step.
- If you control 2(+) copies of Tethys, their effects can all activate in a single Chain when you draw a single Fairy-Type monster.
- This effect cannot activate if you drew a Fairy-Type as Chain Link 2(+).
- This effect cannot activate if you draw a Fairy-Type by Upstart Goblin, which resolves sequentially. The last thing to happen is your opponent gaining 1000 Life Points, not you drawing a Fairy.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.