You do need to deal combat damage to steal artifacts, but with its flying and trample, this is trivially done and will trigger even if just one damage gets through
My thinking is, that if you manage to get a reliable way of reanimating knights indestructible might get in the way as Breathless Knight especially would benefit from creatures traveling back and forth between battlefield and graveyard
Specifically, it makes copies of each card you cast of those types
ZEXAL , they were an archetype centered around Xyz Summoning
Plus, few cards have been as controversial as Raigeki: over the years, its gone from Tournament-Illegal to Banned, and then back to its current Unlimited status
While the list itself has a lot of one-ofs, which might look a bit strange, there are a couple of reasons for the strange splits