Serpent Generator [Legends] Phyrexian Elf Warrior You can't lose the game

You can't lose the game and your opponents can't win the game

Set: Arena League 1999 Type: Basic Land — Plains Rarity: Rare ({T}: Add {W}

Set: Modern Masters 2015 Type: Tribal Enchantment — Faerie Rarity: Mythic Cost: {1}{B} At the beginning of your upkeep

Set: Dragons of Tarkir Prerelease Promos Type: Legendary Creature — Elder Dragon Rarity: Mythic Cost: {4}{B}{R} Flying

This one hasn't slept in ages

Serpent Generator [Legends] Phyrexian Elf Warrior You can't lose the gameSet: Legends Type: Artifact Rarity: Rare Cost: {6} {4}, {T}: Create a 1 1 colorless Snake artifact creature token. It has "Whenever this creature deals damage to a player, that player gets a poison counter." (A player with ten or more poison counters loses the game.)