Yup. Elfie summons the knights.
That said, Mana Shield:
Amira, Corrupt Sorceress, Couatl, Enchantress, Lady Anariel, Nyx, Princess Elspeth, The Dragon Soul, Valkyrie
Borealis, Ifrit, Northrender, Queen Mab, Sekhma, Silver Dragon, Snow Guardian, Snow Sprite, Snowy Owl, Urska Wanderer, Winter Wolf
Barbarous, Behemoth, Carnex, Dracos 1337, Dragon Cruncher, Dwarven Miner, Dwarven Slayer, Fortress Gate, Gloom Leaf, Kruarg the Dread, Lil Johnny Bronze, Manticore, Mongo, Plague,Void Portal, War Goat, War Sphinx, Wulfgarok
Lots of troops to pick from that can ignore mana burn, frozen, or both to help provide a quick way to get rid of Justice and then shrug off the rest of the team while still getting a 4 color team.