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Now in 2026, the promo card is valued at an impressive $2.6k USD in a PSA 10, after originally being released as part of a special stamp box collection set back approximately five years ago

The downside is, unless you actively want to be dumping your hand into the graveyard, you need creatures with high power in order to make Greater Good worth it

Out of respect for the fact that Mai did actually make it quite far in a few tournaments, she is on the bottom on this list

The full list is available below, as you can see, the main deck has 60 cards

If "Macro Cosmos" is applying during effect resolution, the card is banished instead, and the monster is not Special Summoned