Murktide Regent - [Foil, Promo] Secret Lair Showdown (SLP) V13 Whenever another nontoken Elf is

Whenever another nontoken Elf is put into your graveyard from the battlefield

return Prized Amalgam from your graveyard to the battlefield tapped at the beginning of the next end step

If they do

Instant and sorcery spells you cast cost {1} less to cast

Timeless Heroes can be your commander

Murktide Regent - [Foil, Promo] Secret Lair Showdown (SLP) V13 Whenever another nontoken Elf isDelve (Each card you exile from your graveyard while casting this spell pays for {1}.) Flying Murktide Regent enters the battlefield with a +1 +1 counter on it for each instant and sorcery card exiled with it. Whenever an instant or sorcery card leaves your graveyard, put a +1 +1 counter on Murktide Regent.