Haldan & Pako suffer from the unfortunate reality of being kinda unwieldy to play over webcam, but theyre on my shortlist to build once we can venture into the world again
in Commander, I like Daretti, Ingenious Iconoclast and Trash for Treasure, but the skys the limit
(Note that there also is a mechanic called graft used by the Simic in the original Ravnica block, but I'm not talking about that.) Here's an example of a famous old card from Urza's Saga that grafts: The point of grafting is that you take an existing card and expand what it can do by grafting on additional words and/or abilities
For a reasonable 3 mana cost, players can activate their Traveling Chocobo and use it to play any lands or other Chocobo/bird cards in their deck, provided they're in the top spot, potentially gaining a significant upper hand in either standard or commander game types
(Green and Red Starter Deck)
Second is the limited space