Here are the other cards I might want: Sol Ring Arcane Signet Rakdos Signet Commander's Sphere Thought Vessel Fire Diamond Charcoal Diamond Mana Base The mana distribution of your deck depends on how many colored sources you run and what your curve looks like
Tuesday, August 6: D23 Night at the Packing District presented by Ravensburger What better way to get ready for D23 than to join us for a game night
The combination of Amber and Amethyst creates a lot of potential for interesting deck designs, but if you want to prioritize the Madrigal typal, it's best to hone in on the most important, useful Madrigals, and then fill the deck out with stronger strategies.
Plague Mare is obviously not as good, as its a 2/2 instead of a 3/3 with first strike, and it doesnt deal damage to the opponent or planeswalkers they control, but it does have some upside
All in all, this card is a total powerhouse and is more than powerful enough for four mana