The only issue, assuming you don't consider costing ten mana an issue, is that resolving four cascades in a row can get complicated, especially when individual cascades hit other cascade spells mid-resolution
Surely this will never come back to bite me
Summon: Knights of RoundSummon: Knights of Round One of the rarest Summons in Final Fantasy VII , this eight-mana 3/3 with indestructible sticks around for four turns, producing a 2/2 white Knight creature (though not a White KnightWhite Knight) for each of its first four chapters
Disciple of Bolas, Zulaport Cutthroat, Falkenrath Noble, Blood Artist, Grim Backwoods, Sangromancer, Rogue's Passage, Whip of Erebos are all good cards to add
Dragon-types and Flying-types dominated, and cards like VS Seeker and Trainers Mail became staples