Cheapest priced copy (Rivals of Ixalan): $2.49 at Card Kingdom, near mint, their price list as of .
Golden Guardian // Gold-Forge Garrison 
Artifact Creature — Golem // Land · 4/4 · Rare · Rivals of Ixalan · #179
Defender
{2}: This creature fights another target creature you control. When this creature dies this turn, return it to the battlefield transformed under your control.
(Transforms from Golden Guardian.)
{T}: Add two mana of any one color.
{4}, {T}: Create a 4/4 colorless Golem artifact creature token.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $2.49 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Rivals of Ixalan Promos | 179s | Rare | — | $3.99Out of stock |
| Rivals of Ixalan | 179 | Rare | $2.49 | $4.49 |
3 rulings from Wizards of the Coast
- 19 January 2018If Golden Guardian leaves the battlefield before its activated ability has resolved, it won't be returned to the battlefield when the ability resolves.
- 19 January 2018If the target of Golden Guardian's activated ability isn't a legal target as that ability resolves, or if Golden Guardian has left the battlefield, neither creature will deal or be dealt damage.
- 19 January 2018Once Golden Guardian's activated ability has resolved, it will return to the battlefield transformed if it dies for any reason in that turn.