I hope this gives you a good starting point at building your own trigger happy Isshin build, and if you see any crazy combos I may have missed please drop a comment below
The storm keyword (which appears on Empty the Warrens, Grapeshot, Haze of Rage, and Spreading Insurrection) lets you copy a spell for each spell that was cast before it this turn
D&D Plane Shift D&D also got a series of free online supplements (small booklets of info and rules covering a specific setting) for Zendikar, Innistrad, Kaladesh, Amonkhet, Ixalan, and Dominaria along with the three sourcebooks
Then we have the Classic Module, which is only for lands: Since this is a lands-only treatment, its on one common, one uncommon, and seven rares
As a five mana 2/2, Kyler certainly doesnt initially appear very impressive
Hopefully this has been a journey for you as it has been for me, and I hope youre still awake after all that math