Its not the best, but it enables a different play pattern than other commanders on the list
If the giant is fighting weaker enemies, it may settle on the "Pick Up and..." option, which initiates another dice roll to determine whether it stuffs a victim in its bag or down its pants, throws them into their allies like a missile, squashes them in its fist, or eats them
At the top end, you have Spined Tyrranax, which only costs you five mana, tied with Slinza in cost
Thats not a terrible price, especially if youre already playing without budget constraints, but you can find cheaper options
MTG players already use dice regularly, be it a spindown counter, a die to roll and see who goes first, or even d6s to register +1/+1 counters or loyalty counters