Your usage patterns will help determine the type of storage you need
Gold, Always Believe in Your Soul Ikoria also had some extremely potent multicolor spells
Lurrus of the Dream-Den (Borderless Serialized Multiverse Legends) March of the Machine Market Price: $537.50 The second (and far more valuable) serialized kitty herein also happens to be the strongest card by far with the companion ability Lurrus of the Dream-Den, originally found in Ikoria: Lair of the Behemoths
The Monster Manual What follows is a pretty comprehensive list of creatures that I have considered for Birthing Pod in GWB, along with explanations of why they're good or only situational
You simply don't have the gas to completely burn someone out unless you have Guttersnipe support or have managed to apply good pressure with your few dorks
Obviously, there are the usual Simic +1/+1 counter strategies, but you can also use Krajs ability to give it the activated ability of a creature that untaps itself, thereby creating an infinite loop