There are a few permanents that offer more doubling up of counters, as well as ones that save counters from removed creatures, but even without these, Counter Blitz is very powerful right out of the box
This Elsa has the normal foil effect
Thanks to the slower nature of Commander, you should have ample time to set the combo up, as well, but it will have a smaller impact on the game thanks to having four opponents
A lack of red or green makes me slightly suspicious as it cuts off easy access to the wombo-combo of double strike and trample, but tricks and equipment that grant flying probably make up for that
If you have 4 items in play, you can exert all of them to slam down Scrooge McDuck Resourceful Miser, developing a 4|4 Character without needing to use Ink