Ok there was a little chat at the start, and about 15 mins clear up
It may be a creature, but there are very few instances where a player should use Llanowar Elves, or any mana dork creature, to attack or block
There are 16 commons with this look, plus 18 uncommons, 15 rares, and two mythics
Mutagen Man, Living Ooze not only comes with this artifact ability cost reduction, but you can also create X amount of mutagen tokens when it is cast, where X is the additional mana paid to cast it
If only we had checked sooner
Since each sliver card you play makes all your other slivers exponentially stronger, you can't win the game unless you have a lot of slivers under your command