To determine Ghalta's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases, then apply any cost reductions. Ghalta's mana value remains unchanged, no matter what the total cost to cast it was.
If a creature's power is somehow less than 0, it subtracts from the total power of your other creatures. If the total power of your creatures is 0 or less, Ghalta's cost remains {10}{G}{G}.
The total cost to cast Ghalta is locked in before you pay that cost. For example, if you control three 2/2 creatures, including one you can sacrifice to add {C}, the total cost of Ghalta is {4}{G}{G}. Then you can sacrifice the creature when you activate mana abilities just before paying the cost.
Last observed on Scryfall 2 months ago at $3.30. Over the trailing 90 days the price moved between $0.02 and $3.52 across 61 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 3 catalogued treatments from RIX — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #130 of *Rivals of Ixalan*, the set that shipped alongside the January 2018 Rivals of Ixalan release.
Card type: Legendary Creature — Elder Dinosaur, color identity green, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {10}{G}{G} (12 converted). Keyword abilities: Trample.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #474 in Commander, putting it in the popular-include tier of the format's playable pool.
Illustrated by Chase Stone. Rarix catalogs 593 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Chase Stone
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
Ghalta's first ability can't reduce its cost below {G}{G}.
