yugioh metalfoes cards YU-GI-OH! - Mithrilium (INOV-EN040) - Invasion: Vengeance - 1st Edition if a Fusion Monster is Fusion Summoned Metamorformation - Yugipedia

Threaten effects, or effects that temporarily steal opposing creatures, aren't super popular in Commander, though the equation certainly changes when that threat's attached to a 10/10 and also morphs the 'borrowed' creature into an annihilating monster for the turn

If you look at the scan, its difficult to find any noticeable errors

2 Archon Of Cruelty If Liliana is the queen of discard spells, Archon of Cruelty is the king

If you play Vanille when you only have four mana available and you can't drop a land before your turn ends, you won't have the necessary five mana to meld when the ability triggers on the first main phase of your following turn