Interestingly, other canine mammals like wolves, jackals and foxes all have their own creature types
Any type of token buffs it too, whether it's a creature token or not
Grim Initiate would be a strong addition to a red aggro or sacrifice deck in Magic: the Gathering, providing early board presence and the potential to amass additional Zombie tokens upon death
You also have the choice to just put it back in the command zone, which you might want to do if Grenzos not around
It does exactly what you need, which is to swing tempo wildly in your favor
Basically, the sideboarding there is planeswalkers out, Carnage Tyrant and Ixalans Binding in. When in doubt, remember the best plan is usually unleashing the giant, implacable death lizard