They are very strong and great in mono-color brews or ones with their abilities like life gain and mill and such
Even out of the box though, Bellos deck is very cute and pretty powerful, so that might be worth the price of entry alone
But since it's so cheap and has the potential to fuel any discard strategies as the game evolves, it can be a powerhouse in time
Ill be continuing to explore the format in its entirety, including streaming all the PTQs this week, on my Twitch channel
He has double strike, it creates a relatively powerful token, and it gains counters whenever any other creature with greater power dies, including tokens
Guac & Marshmallow Pizza doesn't seem to give much to the combo versions, but the untap might spawn a different variant that could have some mana dorks - or enables a new combo altogether