mtg tree cards Tribute to the World (March of the Machine) Exchange your life total with this creatures toughness Pyre of the World Tree

As for Armored Ascension, its not the first of its kind to reward mono-color decks, but I wanted to highlight it here as part of this focus on color-based restrictions

Ramos, Dragon Engine If you want to play all the mutate creatures available, Ramos, Dragon Engine is one of the best choices around

This is the only way to get Princess Celestia into play: most Princess Celestia toys would be white Alicorns named "Princess Celestia" with flying that lets you scry two when they come into play

Bitter Ordeal Cranial Extraction Denying Wind Dichotomancy Dimir Machinations Extract Haunting Echoes Jester's Cap Kotose, the Silent Spider Lobotomy Lost Legacy Memoricide Neverending Torment Nightmare Incursion Pick the Brain Reap Intellect Sadistic Sacrament Stain the Mind Supreme Inquisitor Thought Hemorrhage Titania's Command