japanese articuno pokemon card Pokémon TCG: Classic CLK-009/032 (Dont apply Weakness and Resistance for Benched Pokémon.) Flavor Text RARE* Articuno Holo Pokemon card.

Obviously these may be a miss for your format for other reasons (power, archetype mismatch, rarity, don't run planeswalkers etc) but here's a few that I found interesting, divided by broad category rather than color: Actual Modal Dual Faced Cards: While I'm still not done reading Cosima, God of the Voyage (I'm on chapter 2, the language is a bit dense) these cards are ones I do like both sides of

Sac Lands Fallen Empires introduced the original sac lands, which enter tapped and can tap to add one mana of their respective color, or tap and sacrifice themselves to add two mana instead

I like this credit line as a compromise

If anything, this new approach to design ensured that certain mechanics felt better placed on the cards where they appeared, rather than feeling forced to meet some form of quota