However, I need the important disclaimer that its still early, and Im very likely just going to be wrong again about something here
For example, if you put Null Profusion (an enchantment that says your maximum hand size is two) onto the battlefield and then a player puts Cursed Rack onto the battlefield choosing you, your maximum hand size will be four
Here are the percentages: (note when I say "rare" below, I mean rare or mythic rare) Common, common will happen 49% of the time
I used to play this card in the old Empoleon / Dusknoir decks before it was cool, and I miss it dearly
"Prime Photon Dragon" can destroy it by battle with a massive ATK boost, and "Tachyon Dragon" will negate all ATK boosts (but not the other "ZW -" effects).
There is a set of different stipulations that a duelist has to fulfill to summon any of the three god cards