Cheapest priced copy (Foundations Commander): $5.49 at Card Kingdom, near mint, their price list as of .
Forsaken Monument 
Legendary Artifact · Mythic · Zendikar Rising · #374
Colorless creatures you control get +2/+2.
Whenever you tap a permanent for {C}, add an additional {C}.
Whenever you cast a colorless spell, you gain 2 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
9 printings · $5.49 to $22.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 950 | Mythic | $8.49 | — |
| Foundations Commander | 258 | Mythic | $5.49 | — |
| Modern Horizons 3 Commander | 293 | Mythic | $7.49 | $12.99 |
| Zendikar Rising Promos | 244p | Mythic | $8.49 | $10.99 |
| Zendikar Rising Promos | 244s | Mythic | — | $20.99 |
| Star Trek Commander | 343 | Mythic | — | — |
| Star Trek Commander | 491 | Mythic | — | — |
| Zendikar Rising | 244 | Mythic | $8.49 | $10.99 |
| Zendikar Rising | 374 | Mythic | $14.99 | $22.99 |
5 rulings from Wizards of the Coast
- 25 September 2020If you tap a permanent for more than one {C}, you add only one additional {C}.
- 25 September 2020Forsaken Monument’s last ability won’t trigger when you play a land.
- 25 September 2020You “tap a permanent for {C}” only if you activate a mana ability of that permanent that includes the {T} symbol in its cost, and only if it produces one or more {C} as it resolves.
- 25 September 2020A land is normally colorless, regardless of what colors of mana that land can produce. If an effect makes a colorless land into a creature without specifying that it becomes a certain color, the land creature gets +2/+2.
- 25 September 2020An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.