works perfectly if you dont have CV yet, can work with stray lambs tribute set or cost down. you just need to make sure that you set first overwhelm and wait for your opponents turn or your next turn. and make sure to switch first your 7* up monster into a faceup atk pos if you used stray lambs.
So this happens, i tribute summon BEWD using bubonic vermin flip summon. Then i added overwhelm to my back row.i waited for almost 2 turns for overwhelm to be active since it doesnt work on my enemy's security orb then after 2 turns my BEWD was destroyed by michezure hence i got overwhelm.lol
This one applies to monster effects, which champion's vigilance can't do. It can also be painful to farm kaiba for it. Otherwise, though, it's better than overwhelm.
this card has not been working for me. i would use stray lambs to summon my kazejin or suijin or blue eyes and it would not work for me. same with kazejin effect some times. i think the game still has bugs.