Last Light of Durin's Day

Unlike High Noon, it has no immediate impact and normally needs six later Mountain entries plus a worthwhile Dragon, with no supported shell shown.

Could be wrong if Unrevealed Standard Dragon payoffs or reliable extra-land effects could make the delayed tutor materially faster.

The six-Mountain condition is too delayed for established Pioneer pacing; Mountaincycling smooths mana but does not repay the card spent.

Could be wrong if A Mountain-heavy ramp or land-entry shell with a premium Dragon target could provide a niche outlet.

Modern's efficient two-mana enchantments, such as High Noon, act immediately; waiting through six Mountain entries for one Dragon is a major liability.

Could be wrong if A proven multi-land-entry engine paired with a uniquely valuable Dragon could create a narrow combo role.

Legacy's speed and cheap interaction make a two-mana setup that needs six subsequent Mountain drops far too slow; cycling is modest insurance only.

Could be wrong if An unusually efficient Mountain-entry combo or target that wins immediately could justify isolated testing.

Dragon decks can deploy this early, naturally reach six Mountains, and turn it into a precise free Dragon; the long exposure and color restriction cap it.

Could be wrong if Multicolor Dragon mana bases may not produce six Mountains, and many decks can simply cast their expensive Dragons by then.

Mountaincycling is a passable smoothing fallback, but six later Mountain drops plus a drafted Dragon is slow and inconsistent for a non-board-impacting rare.

Could be wrong if Dragon density, extra-land effects, and format pace are unknown; strong accessible Dragon payoffs could improve it.