Strangely, Isshin doesn't care about who controls the attacking creatures, so his ability can also be used defensively with Revenge of Ravens from the much-maligned MTG set Throne of Eldraine and Search the Premises from Modern Horizons 2
If this seems unusually helpful of him, he really just wants us to get rid of Marik and the Ghouls for him
And yet Kaima thought it strange as well
Generaider Boss Quest X SPELL Reveal 1 "Generaider" monster in your hand, and if you do, add up to 2 "Generaider" Spells/Traps with different names from each other from your Deck to your hand, except "Generaider Boss Quest"
This was done by Sid himself and information on marking the boxes can be found here or viewed in the images of this listing
Its fairly intuitive after years of playing, but theres occasionally a bit of back-and-forth