Festering Thicket

• WOTC Official Reminder Textofficial rules
  Cycling — Cycling [cost] (Pay [cost], discard this card: Draw a card.)

• WWizards of the Coast2025-07-25
  Official Ruling
  Unlike some other dual lands, Festering Thicket has two basic land types. It’s not basic, so effects that search for basic lands (such as the ability of a Lander token) can’t find it, but it does have the appropriate land types for effects such as that of Wastewood Verge (from the Aetherdrift release).

Rulings via Scryfall