The Eldest Reborn + Core Prowler + Ashnod's Altar + Hex Parasite + Bog Initiate

The Eldest Reborn

Core Prowler

Ashnod's Altar

Hex Parasite

Bog Initiate

How it works

1. Sacrifice Core Prowler to Ashnod's Altar for CC.
2. Proliferate the lore counter on The Eldest Reborn.
3. Target Core Prowler with the saga trigger.
4. In response to the saga trigger use Bog Initiate to turn one of the generic mana from Ashnod's Altar into and activate Hex Parasite having x be 1 targeting Eldest Reborn lowering it to two lore counters.
5. Hex Parasite gets +1/+0 until end of turn.
6. Resolve the saga trigger returning Core Prowler to the battlefield.
7. Repeat.