Whenever Astrid Peth enters or attacks, create a Food token.
Brand-new Sky — Whenever you sacrifice a Clue or Food, Astrid Peth explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)
Astrid Peth is a mono-white voltron-ish value engine: churn out Food (and Clues) and sacrifice them to repeatedly explore, growing Astrid and digging for lands while sacrifice payoffs and lifegain pile up. Early turns you cast Astrid, generate tokens, and start an explore loop; mid-game you turn that engine into a giant commander backed by white's protection and equipment, or into a grindy aristocrats/lifegain shell that drains the table.
Extremely cheap commander (2 MV) that immediately builds card advantage and a growing body
Explore smooths draws, filters lands, and provides repeatable scaling without needing other creatures
Food and Clue synergies enable both lifegain and aristocrats subthemes
Mono-white keeps the deck consistent and resilient to color-screw
Mono-white's classic shortage of card draw and ramp can leave you behind faster decks
Heavily commander-reliant; repeated removal shuts down the engine and tax adds up
Slow clock if built as pure value—needs a real win condition
No built-in protection, so a single board wipe or exile effect sets you way back
Legendary Creature — Human
