Yenna, Redtooth Regent + Ordeal of Nylea + Amulet of Vigor + Auratog

Yenna, Redtooth Regent

Ordeal of Nylea

Amulet of Vigor

Auratog

How it works

1. Activate Yenna by paying 2 and tapping it, creating a token copy of Ordeal of Nylea, then untapping Yenna and causing you to scry 2.
2. Activate Auratog by sacrificing the Ordeal of Nylea token.
3. The Ordeal of Nylea token's second ability triggers, causing you to search your library for two basic land cards and put them onto the battlefield tapped.
4. When the lands enter the battlefield, Amulet of Vigor triggers twice, untapping them.
5. Resolve the Auratog ability from step 2, giving it +2/+2 until end of turn.
6. Activate the two lands by tapping them, adding 2.
7. Repeat.

This elegant loop puts every single basic land from your library directly onto the battlefield by turning Yenna, Redtooth Regent into a relentless duplication engine for Ordeal of Nylea. Since Yenna's ability untaps herself whenever she copies an Aura, you can continuously pay into her activation cost using the {2} generated by tapping your lands. Auratog serves as the sacrificial outlet that neatly triggers the Ordeal token's sacrifice ability before it can accumulate its third counter naturally, and Amulet of Vigor ensures that every fetched basic land enters untapped and immediately ready to pay for the next iteration.