Edison format ruling
Horseytail
Card effect (current official text)When this card is destroyed by battle and sent to the Graveyard, Special Summon 1 "Horseytail Token" (Plant-Type/WIND/Level 1/ATK 0/DEF 0) to your opponent's side of the field in Defense Position. When this Token is destroyed by battle with a Plant-Type monster, its controller sends 1 card from their hand to the Graveyard.
Rulings
source: Rulings_Edison (Format Library) · 4 era-inappropriate line(s) removedRulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.