Im not a particular fan of the Red/Green archtype because it seems to be more of a good-card one, with a minorramp theme, failing to generate overall synergy you might see in other archtypes
Not properly tested as yet but a lot more interesting and exciting than Harmonize
There are also some nice cards that take advantage of the multiplayer format, but not loaded up in a way that makes everything seem overpowered
This can +2 to draw a card and scry two which is nice card flow, and then -3 to exile the top card of your library and then make a number of 1/1 flyers equal to the mana value, which is also very strong in Type Four with its elevated casting costs and low land count
Eldritch Moon 's Voracious Reader Have you ever looked for a story from your childhood that you long thought was missing
Putting aside the implications of pushing all your cards to the side to make room for an entire new game, theres a lot of room for this card to create incredibly long games of Magic