Infinity(but gets mauled)

this deck gets mauled by sealed decks even but i really want it to work. irs so fun when it does (once in a blue moon). combo is lotus cobra with hedron crab, ruin ghost, and tideforce elemental for a mill. lotus cobra can be subsituted by 2 amulets which stack to untap your lands and yo0u can get infinite life (until you fire off the combo). cascade and selective memory help you find what you need. i need help as this deck, although fun, is absolutely hopeless... maybe theres something that can help it? perhaps the cascade is excessive? the waterveil is to shoot off the combo by suprise. the sphinx is just a fattie. i need some cheap walls or something but if theyre cheap theyll get cascaded into. maybe this would work better without cascade? anyone think this idea will ever be playable competitively? removal seems to murder this. the sb isnt real i just needed filler. and im debating the usefullness of knight of the reliquary.