This is true even if the ability states that must be paid with a certain color of mana, as Crimson Hellkite's ability does
Andril, Flame of the West Aragorn and Arwen, Wed Aragorn, the Uniter Arwen, Mortal Queen Dawn of a New Age Gandalf the White Glamdring Hew the Entwood Last March of the Ents Mount Doom Palantr of Orthanc Radagast the Brown Saruman of Many Colors Sauron, the Dark Lord Sauron, the Lidless Eye Shadow of the Enemy Spiteful Banditry Storm of Saruman The One Ring The Watcher in the Water Tom Bombadil Witch-king of Angmar

These are some of my favorites: Caustic Caterpillar, Hammer Mage, Manglehorn, Reclamation Sage, Viashino Heretic, Sunder Shaman, Acidic Slime, Ingot Chewer, Molder Slug, Bane of Progress, Nature's Claim, Hull Breach, Cindervines, Vandalblast, By Force, Meltdown Artifacts/Enchantments: Ulvenwald Tracker, Polukranos, World Eater, Balefire Dragon, Blasphemous Act, Chain Reaction, Sudden Demise, Rolling Earthquake Creatures: Scavenging Ooze, Deathgorge Scavenger, Loaming Shaman, Ravenous Slime Graveyard: Acidic Slime, Decimate Flexible: Tutors The best creatures that can also tutor have to be Fierce Empath, Fauana Shaman, Imperial Recruiter, and Woodland Bellower
Outlast only as a sorcery.) Modified creatures you control have lifelink
Sure, you have to sacrifice her after the fact, but Id say a game win is more than worth it
After all, if you see an enemy that looks like theyre going to be an issue for your strategy, you can simply divert their violence elsewhere