Cheapest priced copy (Zendikar Rising Promos): $1.29 at Card Kingdom, near mint, their price list as of .
Charix, the Raging Isle 
Legendary Creature — Leviathan Crab · 0/17 · Rare · Zendikar Rising · #325
Spells your opponents cast that target Charix cost {2} more to cast.
{3}: Charix gets +X/-X until end of turn, where X is the number of Islands you control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $1.29 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Zendikar Rising Promos | 49p | Rare | $1.29 | $2.49 |
| Zendikar Rising Promos | 49s | Rare | — | $2.49 |
| Secret Lair Drop (Mr. Krabs, Penny Pincher) | 1927 | Rare | $4.99 | $4.99 |
| Zendikar Rising | 49 | Rare | $1.29 | $1.49 |
| Zendikar Rising | 325 | Rare | $1.29 | $1.99 |
| Zendikar Rising | 386 | Rare | — | $1.29 |
3 rulings from Wizards of the Coast
- 25 September 2020To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases (such as that of Charix), then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
- 25 September 2020An opponent's spell that targets Charix more than once costs only {2} more to cast.
- 25 September 2020Each time you activate Charix's last ability, the value of X for that instance of the ability is determined only as that ability resolves. Once that happens, the size of the power-and-toughness change for that instance of the ability won't change later in the turn, even if the number of Islands you control does change.