Whenever a player taps an opponent's creature, they can pay one additional mana to either create a 4/4 Elemental creature token, give each creature they control a +1/+1 counter, or scry two and draw a card
Madrigal Magic is an Amber/Amethyst deck with nearly all of the Madrigal family plus the family casa
Panharmonicon nets you two lands from Solemn Simulacrum (but doesnt duplicate the trigger on the way out), it kills two creatures with Big Game Hunter, and it gives opponents creatures -4/-4 with Massacre Wurm
I have written about a lot of the cards that get upside here and I dont want to rehash too much of the article I wrote this week here, but the list of cards that get upside from this guy are almost too many to name
Its a great answer to control decks since it makes tokens on cast, minimizing the usefulness of countermagic, and is practically impossible to remove