Black (Common), Silver (Uncommon), Gold (Rare), Red-Orange (Mythic Rare)
Sorcery Color tag templates(None) Chatterstorm Create a 1/1 green Squirrel creature token
Five life is quite a lot to pay in todays Commander metagame, but this feels costed just right as something that will cost life on crucial or early turns and otherwise just cost three mana
Create a token that's a copy of target permanent, except it's a 4/4 Dragon creature with flying in addition to its other types
There are some Slivers still available to players on a budget, as well as some Sliver-centric spells that can kick Sliver Swarm up a notch
The +2/+2 boost and hexproof from mono-colored spells make it tough to answer, and the more colors your creature has, the cheaper it is to equip