Roc of Kher Ridges [Unlimited Edition] Elder Dragon it produces colorless mana instead

it produces colorless mana instead of white mana

Rhonas the Indomitable can't attack or block unless you control another creature with power 4 or greater

Set: Zendikar Type: Legendary Planeswalker — Nissa Rarity: Mythic Cost: {2}{G}{G} +1: Search your library for a card named Nissa's Chosen

While it's true that a quillspike does heal the sick

Set: Magic Origins Type: Creature — Angel Rarity: Mythic Cost: {1}{W}{W}{W} Flying

Roc of Kher Ridges [Unlimited Edition] Elder Dragon it produces colorless mana insteadSet: Unlimited Edition Type: Creature Bird Rarity: Rare Cost: {3}{R} Flying We encountered a valley topped with immense boulders and eerie rock formations. Suddenly one of these boulders toppled from its perch and sprouted gargantuan wings, casting a shadow of darkness and sending us fleeing in terror.