To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Earth Crystal's first ability)
It see play in 1 formats: Commander
20 Obosh, The Preypiercer You Won't Even Believe It Obosh, the Preypiercer is a five-mana commander printed in Ikoria that offers a simple yet very effective ability that can greatly increase its controller's damage output
Its likely Ariel for her voice, as weve got lots of Ariel voice references and Ursula singing throughout the cards
Essentially, a deck that can get multiple lands out per turn, cast giant creatures early, and mash opponents to death using those giant creatures along with some trample sprinkled in here and there
Spellslinger decks around the world want a land that not only triggers your cards but also adds a synergy piece