mtg cards that give you no maximum hand size Thought Vessel (surge foil) You have no maximum hand size. These cards should all be

On the battlefield, you need Marrow-Gnawer without summoning sickness, and you need at least two other rats

As a commander by itself, Blue wants to play cards like Slippery BogbonderSlippery Bogbonder, Agent's ToolkitAgent's Toolkit, and all the other cards that you would find in a typical +1/+1 counter deck, as having all of your Dinosaurs come in bigger is never a bad thing

The shuffle is more of a bonus than the point of the card

It enters with that many +1/+1 counters on it.) Whenever this creature enters or attacks, target opponent loses X life and you gain X life, where X is the number of +1/+1 counters on it

That makes it a lot better in the more general sense but when you expect to reliably have sac outlets the value on that decreases somewhat