Aatchik, Emerald Radian | Esix, Fractal Bloom

Cards

({3} magic symbol) ({B} magic symbol) ({B} magic symbol) ({G} magic symbol) available.

Cast
Aatchik by paying ({3} magic symbol) ({B} magic symbol) ({B} magic symbol) ({G} magic symbol) .
When
Aatchik enters, its first ability triggers, and
Esix allows you to create a token copy of
Aatchik for each artifact and/or creature card in your graveyard.
Put all but one copy of
Aatchik into the graveyard due to the legend rule.
When each
Aatchik token enters, its first ability triggers, and when each
Aatchik dies, the last ability of each other
Aatchik triggers.
Resolve all of the death trigger abilities, causing each opponent to lose 1 life each time and (for the surviving
Aatchik's triggers only) putting a +1/+1 counter onto
Aatchik.
If any opponents remain alive, resolve all of the enter trigger abilities, each time creating a 1/1 Insect creature token for each artifact and/or creature card in your graveyard.

This combo causes each opponent to lose N * N life, where N is the number of artifact and/or creature cards in your graveyard. Six of those cards will cause each opponent to lose 36 life. Seven of those cards will cause each opponent to lose 49 life.

This combo has been estimated to be Oddball (Bracket 2-3+).