go ahead and remix, i myself have the sigils and way of summoning all done, just draw on your custom card for insingtion, i will add my favorite, Draw the character, health and damage, then tell me yourself what you want it's sigil/ power and way of summoning, for summoning choose: Needs Egg(s) (wublin/celestial/amber-like monster). Needs Coin(s) (Single element). Needs Heart(s) (Double/triple). Needs Heart(s) and coin(s) (Quad). Needs Heart(s) and Eggs (Ethereal/Seasonal/Legendary/Mythic) .etc a sigil of your choice, Describe your monster, or if you have skill, maybe you can draw it yourself, then make the health and damage. give it a name. and finally: don't make it too OverPowering.