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

Legendary Creature - Peasant Halfling Samwise Gamgee Whenever another nontoken creature you control enters, create a Food token

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

Once Sandswirl Wanderglyph's middle ability resolves, that opponent won't be able to attack you or planeswalkers you control that turn, even if Sandswirl Wanderglyph is no longer on the battlefield