Recruit the Worthy can create creatures during a computation which is bad; but if its purpose is just for storm count then Change of Heart works.
There's a decent explanation of how TWM and waterclocks work in this now-outdated writeup; the idea is we implement a specific UTM with a fixed number of waterclocks (as few as 6 is possible, though there are easier to understand constructions using more), in which its tape is encoded in the values of certain waterclocks; i.e. the number of creatures of certain types. And then the states + tape of any arbitrary TM are encoded within the tape of this UTM.
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There's a decent explanation of how TWM and waterclocks work in this now-outdated writeup; the idea is we implement a specific UTM with a fixed number of waterclocks (as few as 6 is possible, though there are easier to understand constructions using more), in which its tape is encoded in the values of certain waterclocks; i.e. the number of creatures of certain types. And then the states + tape of any arbitrary TM are encoded within the tape of this UTM.