Green has maybe the strongest intuitive identity of any color, besides black
The cheapest battles, of which there are nine, touch all five Magic colors either by themselves or as part of a color pair
It was just nice to have, it answered almost everything and that wasn't something red was used to being able to do
Obviously, that mechanic was heroic

Dragon 1 Red-Eyes Darkness Metal Dragon 2 Red-Eyes Alternative Black Dragon 1 Red-Eyes Archfiend of Lightning 1 Meteor Dragon Red-Eyes Impact 2 Impcantation Candoll 2 Impcantation Talismandra 2 Impcantation Penciplume 2 Impcantation Bookstone 1 Monster Reborn 1 Foolish Burial 2 Polymerization 1 Red-Eyes Fusion 3 Red-Eyes Insight 2 Red-Eyes Transmigration 2 Dark Dragon Ritual 3 Pre-Preparation of Rites 2 Red-Eyes Spirit 1 Return of the Red-Eyes 1 Hieratic Seal of the Heavenly Spheres 1 Daigusto Emeral 1 Number 101: Silent Honor ARK 1 Number 11: Big Eye 1 Mecha Phantom Beast Dracossack 1 Dark Armed, the Dragon of Annihilation 3 Red-Eyes Flare Metal Dragon 1 Dark Anthelion Dragon 1 Number 38: Hope Harbinger Dragon Titanic Galaxy 1 Number 62: Galaxy-Eyes Prime Photon Dragon 1 Galaxy-Eyes Full Armor Photon Dragon 1 Meteor Black Comet Dragon 1 Archfiend Black Skull Dragon Deck Concept A Red-Eyes (Ritual Summon) Deck focused around the Ritual Monsters Lord of the Red and Paladin of Dark Dragon

This red mythic rare is risky to use, and if it goes wrong, the player will lose a huge chunk of their mana base for nothing