Another thing is that it cares about modified creatures
In fact, it was the interest in the Mistform creatures that started the tribal boll rolling
In pretty much every game we played, both players inevitably ran out of cards in their hand and for the rest of the game they were at the mercy of their topdeck
Soul Separator brings him back for another number
The Cloud, Midgar Mercenary card also doesnt really fit the narrative here, but it does have deliberate synergy with the Buster Sword, allowing you to search your deck for an equipment card, and his abilities also double-trigger (kind of like the Double Cut materia!)
You only ever see one mythic card for every eight rares on average, and you see six or seven commons out of each play booster