Mutagen or $MTGN token is an internal means of payment for breeding new roaches. It can be obtained by players as a reward for participating in races. $MTGN tokens can be freely exchanged between players. The supply of $MTGN tokens is unlimited. But the number of tokens supplied to the system is adjusted depending on economic factors, such as racing events, breed count and roach liquidations.
Racing participants are rewarded with $MTGN tokens for each run. The token emission rate will gradually decrease in order to speed up the system's growth. The emission rate can be changed for the purpose of balancing participation incentives. $MTGN tokens are burned by the system during their use in the breeding process.