One of the most notable thing about the Zendikar Rising and Kaldheim decks was that their lower power levels also meant a lower price
for example, a flicker deck whose only interaction involves ETBs can fold to Torpor Orb, but a March of Otherworldly Light takes care of it
Birthing Pod's ability is quite powerful in any context, but when a deck is specifically built to take advantage, it becomes nearly impossible to beat
You need a card to counter abilities, like Voidslime, but then you'd also need another counter for the beefy body which is also a win con
There's also always the risk that one of their creatures will be the wrong color, or it will fly, or something similar will go wrong, and the creatures that can't attack are still around to prevent you from winning the game in the meantime
While Demons are usually black in Magic , he works with red Demons like Balor, and gets along with blue Demons, too