Say you use Major Image. You tightly wrap your opponents with illusory adamantium chains (or another material strong enough your opponent cannot reasonably destroy), then make it real with Illusory Reality.
Note that Major Image can create 20 cubic feet of material. Doing some quick research, a G40 chain in real life — that is an anchor chain with a 400 MPa tensile strength made of galvanized steel — will be around 15,000 feet long. That means its tensile strength, just made of steel, can withstand someone struggling against it up to 4000 atmospheres, and it is long enough to wrap all your enemies twenty times over. Now imagine it was adamantium.
You have instantly restrained all your enemies with no hope of breaking free, unless via magical means — that sounds unbelievably powerful. Is that right?
From a strict reading of rules, is this allowed?