Next time, bring a friend
Gyruda may be a tiny bit better in a Dimir deck due to how easy it will be to cast, but really, as long as your deck is capable of producing either black or blue mana, the card should still be eminently castable and you have to be careful not to get caught in the trap of seeing it as purely a Dimir card, as the majority of two-colour combinations will have access to Gyruda if they want to play it
Standard was where the money came from, as its the format people needed new cards for
Magic: The Gathering have fixed poison by adding two new mechanics toxic, and corrupted
If all your value engines are destroyed and you're left with a Ludwig Von Drake, you'll struggle to eke out a victory
This is absolutely a commander Ill be putting together and testing as soon as I can get my hands on it, and you should too