Card

Greater Good

Mana cost {2}{G}{G}

Sacrifice a creature: Draw cards equal to the sacrificed creature's power, then discard three cards.

Part of 14 known combos, 4 of them two-card. 3 official rulings.

Bracket

B1 Exhibition — Not in the same deck as its two-card combo partners: Ominous Seas, Body of Research, The Watcher in the Water, Cryptcaller Chariot
B2 Core — Not in the same deck as its two-card combo partners: Ominous Seas, Body of Research, The Watcher in the Water, Cryptcaller Chariot
B3 Upgraded — Not in the same deck as its early two-card combo partners: Ominous Seas, Body of Research, Cryptcaller Chariot
B4 Optimized — allowed: No restriction beyond the banned list
B5 cEDH — allowed: No restriction beyond the banned list

Two-card combo with Ominous Seas, Body of Research, The Watcher in the Water, Cryptcaller Chariot (early with Ominous Seas, Body of Research, Cryptcaller Chariot)

Bracket: Lotus Vault analysis, with Commander Spellbook flags

14 known combos, 4 of them two-card.

Ominous Seas + Greater Good
Produces: Infinite draw triggers, Near-infinite card draw, Near-infinite looting
View on Commander Spellbook
Hogaak, Arisen Necropolis + Greater Good + Zombie Infestation
Produces: Infinite draw triggers, Near-infinite creature ETB, Near-infinite self-discard triggers
View on Commander Spellbook
Greater Good + Body of Research
Produces: Infinite card draw, Infinite draw triggers
View on Commander Spellbook

2020-08-07 · Wizards of the Coast
Use the sacrificed creature's power as it last existed on the battlefield to determine how many cards you draw.
2020-08-07 · Wizards of the Coast
If you don't have three cards in hand when instructed to discard three cards, you discard your hand.
2020-08-07 · Wizards of the Coast
You draw and discard cards all while Greater Good's ability is resolving. Nothing can happen between the two, and no player may choose to take actions.

Rulings: Scryfall · Wizards of the Coast