Rideable Mantis is a uncommon Creature — Insect Mount card from Unknown Event (UNK), collector number UW03a. Current market price: $7.23, TCGplayer market prices via Scryfall.
Whenever Rideable Mantis attacks, it gains flying until end of turn if it was saddled by a blue creature this turn. It gains trample until end of turn if it was saddled by a red creature this turn. If it was saddled by a white creature this turn, untap it. Saddle 1