That doesnt matter
In fact, it's a shock to many that such a tycoon game hasn't been attempted prioras the fantasy of running a card shop, though niche, is one that's at least somewhat appealing to those in the hobby
Sometimes while playing Magic, particularly in Commander, a game just isnt going your way
If you like Goblins, try out Swarming Goblins that gives you the chance to put between one to three Goblins onto the battlefield over and above the 4/3 creature you get to start with
You need five 1/1s, four 2/2s or three 3/3s and a Shock to do 20 to zero with a Garruk ultimate
If Grist, Voracious Larva leaves the battlefield while its triggered ability is on the stack, you can't exile it from the zone it's put into, so you won't return it to the battlefield transformed under its owner's control