Edison format ruling
Trap Eater
Card effect (current official text)Cannot be Normal Summoned/Set. Must be Special Summoned by sending 1 face-up Trap Card your opponent controls to the Graveyard, and cannot be Special Summoned by other ways.
Rulings
(C) This card cannot be Normal Summoned or Set. (S) This card cannot be Special Summoned except by sending 1 face-up Trap Card your opponent controls to the GY.
- The (C) Condition cannot be negated.
- The (S) Summon Effect does not start a Chain.
- Sending 1 face-up Trap Card your opponent controls to the GY is a cost.
- You cannot Summon "Trap Eater" by sending "Macro Cosmos" to the GY
- If "Macro Cosmos" & "Imperial Iron Wall" are on the field, you cannot send "Imperial Iron Wall" to the GY to Summon "Trap Eater", but you can send "Macro Cosmos" to the GY.
- While "Skill Drain" negates "Vanity’s Fiend", you can send Skill Drain to Special Summon this card.
- If Royal Decree negates "Rivalry of Warlords", you can send "Royal Decree" to Summon this card; but if your other face-up monster is not Fiend-Type then "Trap Eater" will be sent to the GY.
- If "Royal Oppression" is sent to the GY, its effect cannot be used to negate the Summon.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.