Patron of the Orochi [Betrayers of Kamigawa] HGSS11 You must determine WHICH serial

You must determine WHICH serial killer is accountable

Set: Sun & Moon: Base Set Type: Colorless Rarity: Promo Retreat cost: Colorless

Set: San Diego Comic-Con 2018 Type: Legendary Planeswalker — Nissa Rarity: Mythic Cost: {3}{G}{G} +1: Untap target land you control

Set: Portal Second Age Type: Creature — Elf Druid Rarity: Rare Cost: {2}{G}{G} {T}: You may put a green creature card from your hand onto the battlefield

The similarities were uncanny

Patron of the Orochi [Betrayers of Kamigawa] HGSS11 You must determine WHICH serialSet: Betrayers of Kamigawa Type: Legendary Creature Spirit Rarity: Rare Cost: {6}{G}{G} Snake offering (You may cast this card any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake. Mana cost includes color.) {T}: Untap all Forests and all green creatures. Activate this ability only once each turn.