The next step is to use that absolute glut of mana that you've generated by abusing Basalt Monolith and a card that ups its mana production as well as one to three blue mana in order to cast any one of a few different cards, such as Drown in Dreams
Ivy fully takes advantage of mutate's weirdness
Buying a recently-released set of Japanese cards may or may not be cheaper than an English set
Adding multiple Fungus Sliver effects to the aforementioned Psionic Sliver, for example, can get out of hand pretty quickly
MTG Hivemind does create a lot of bad and ordinary pieces, but so do humans, right
However, opponents casting more than one spell per turn happens fairly often, which means you'll likely draw some cards out of Mangara's second trigger