1999 blastoise pokemon card - 1st Edition Shadowless Pokémon Hit Points70 HP Form Sold at Auction: 1999 Pokemon

You get to draw a card when a creature with defender comes into play, which is already a good replacement for plenty of blue game changer cards

The actual events that took place would be fleshed out a lot in future expansions that acted as prequel and sequels to this story, but that bare-bones background would be the primary background for Antiquities

I don't usually like 3-cost mana rocks, however, it can untap a legendary creature and Shadowheart needs to tap to use its ability, so I will make an exception

Will of the Mardu Will of the Mardu is exquisite for its flexibility

In a homebrew deck the potential of the token creation is going to be much higher making this a very strong ability, but the goad effect will always be just one creature per opponent, assuming you hit each opponent so this is less impactful