ETCHEDCheapest priced copy (Commander Legends): $0.49 at Card Kingdom, near mint, their price list as of .
Belbe, Corrupted Observer 
Legendary Creature — Phyrexian Zombie Elf · 2/2 · Rare · Commander Legends · #590
At the beginning of each postcombat main phase, the active player adds {C}{C} for each of your opponents who lost life this turn. (Damage causes loss of life.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 270 | Rare | $0.49 | $0.99 |
| Commander Legends | 590 | Rare | — | — |
3 rulings from Wizards of the Coast
- 10 November 2020If an opponent lost life and subsequently lost the game, Belbe's triggered ability still counts that player to determine how much mana to add.
- 10 November 2020If an opponent loses life before their own postcombat main phase, Belbe will reward their suffering with mana.
- 10 November 2020If an effect creates an additional combat phase in a turn, it may also create an additional main phase after that combat phase. Belbe's ability triggers at the beginning of each of these postcombat main phases.