@seanb have you encountered in guild siege. Carcano brita smicer. Its a highly infuriating defense and they all vio procc 3 times per cycle and you cant kill it :)
first step get ren i can't even get a new nat 5 since the 10years event used like +2000 mystical ( farmed ton ton ton of them +saving ) still waiting core units like adriana juno ren zibala and for ld side im at 7 hoh in a row over 100ld used and yet im still lacking nearly all ld outside of hoh