At a single mana, it severely reduces the chances of your opponent targeting your creatures on a base level
Basic ideas about battle cards While they are mostly designed to work on all formats, battle cards seem to be most optimized for Commander (and maybe Limited) by the nature of their mechanics
I think I can easily say, without reference, that Mirage is fairly well-known to enfranchised players as the height of showing black characters in Magic

fun red cards Artifact (20) 1x Cloud Key 1x Elixir of Immortality 1x Extraplanar Lens 1x Font of Mythos 1x Gate to the AEther 1x Gilded Lotus 1x Helm of Awakening 1x Knowledge Pool 1x Krark's Thumb 1x Orbs of Warding 1x Otherworld Atlas 1x Pristine Talisman 1x Ruby Medallion 1x Sol Ring 1x Soul Conduit 1x Sun Droplet 1x Tangle Wire 1x Temple Bell 1x The Immortal Sun 1x Thunderstaff Creature (6) 1x AEther Membrane 1x Boldwyr Heavyweights 1x Chaos Lord 1x Humble Defector 1x Soulbright Flamekin 1x Steel Wall Land (38) Enchantment (17) 1x Confusion in the Ranks 1x Custody Battle 1x Elkin Lair 1x Fractured Loyalty 1x Goblin Festival 1x Grip of Chaos 1x Impulsive Maneuvers 1x Mana Cache 1x Mana Flare 1x Pandemonium 1x Planar Chaos 1x Possibility Storm 1x Risky Move 1x Steam Vines 1x Stranglehold 1x Vessel of Volatility 1x Wild Evocation Sorcery (13) Commanders (2) Instant (4) Suggestions Updates Add Comments Attention

Gramma Tala, Spirit of the Ocean is a seven-cost card that has excellent stats: with four willpower, a whopping eight health and the option to quest for two lore
Neither can escape the realm, with Ugin watching over Bolas until his death