Activate Ashnod's Altar by sacrificing Seraph of the Scales, adding {C}{C}.
When Seraph of the Scales dies, it and Nim Deathmantle trigger,
Resolve the Seraph of the Scales trigger, creating two creature tokens.
Holding priority, activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Resolve the Nim Deathmantle trigger, causing you to pay {4} to return Seraph of the Scales from your graveyard to the battlefield and attach Nim Deathmantle to it.
Repeat.

Infinite colorless mana

Infinite creature tokens

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Seraph of the Scales

Activate Ashnod's Altar by sacrificing Seraph of the Scales, adding {C}{C}.
When Seraph of the Scales dies, its afterlife ability triggers, creating two 1/1 Spirit creature tokens.
Activate Ashnod's Altar twice by sacrificing the Spirits, adding {C}{C}{C}{C}.
Activate Prismite by paying {2}, adding {B}.
Activate Kenrith's fifth ability by paying {4}{B}, returning Seraph of the Scales to the battlefield from your graveyard.
Repeat.

Kenrith, the Returned King

Prismite

Activate Ashnod's Altar by sacrificing Seraph of the Scales, adding {C}{C}.
When Seraph of the Scales dies, its afterlife ability triggers, creating two 1/1 Spirit creature tokens.
Activate Ashnod's Altar twice by sacrificing the Spirits, adding {C}{C}{C}{C}.
Activate Crossroads Candleguide by paying {2}, adding {B}.
Activate Kenrith's fifth ability by paying {4}{B}, returning Seraph of the Scales to the battlefield from your graveyard.
Repeat.

Crossroads Candleguide

Activate Ashnod's Altar by sacrificing Seraph of the Scales, adding {C}{C}.
When Seraph of the Scales dies, its afterlife ability triggers, creating two 1/1 Spirit creature tokens.
Activate Ashnod's Altar twice by sacrificing the Spirits, adding {C}{C}{C}{C}.
Activate Signpost Scarecrow by paying {2}, adding {B}.
Activate Kenrith's fifth ability by paying {4}{B}, returning Seraph of the Scales to the battlefield from your graveyard.
Repeat.

Combos with "Seraph of the Scales"