It has been a long time since a three-mana planeswalker has been bad (I purposely try and ignore Jace, Cunning Castaway)
It would be on a tier with a secret rare or gold star depending on what kind of 1st ed card you nabbed randomly in your packs
Whenever an opponent plays a land, you may put a land card from your hand onto the battlefield
That's because especially when compared to the power level of Magic cards from 30 years ago the contents of the MTG Spongebob Squarepants Secret Lair make legitimately formidable additions to your deck
Mm'menon, the Right Hand Maybe you made a bunch of gnomes, food, or clues, or you have an Ichor Wellspring just sitting around, Mm'menon, the Right Hand turns all of those into mana rocks, and as long as you play cards from the top of the library like it allows, or cast from exile, or the graveyard, you'll more than get your money's worth out of Mm'menon