Activate Selvala by paying {G} and tapping it, adding at least {2}{G}.
Activate Saryth by paying {1} and tapping it, untapping Ioreth.
Activate Ioreth's second ability by tapping it, untapping Saryth and Selvala.
Repeat.

Infinite colored mana

Infinite untap of legendary creatures you control

Infinite mana legendary creatures you control can produce

Ioreth of the Healing House

Saryth, the Viper's Fang

Selvala, Heart of the Wilds

Activate Arixmethes by tapping it, adding {G}{U}.
Activate Saryth by paying {1} and tapping it, untapping Ioreth.
Activate Ioreth's second ability by tapping it, untapping Saryth and Arixmethes.
Repeat.

Arixmethes, Slumbering Isle

Activate Lotus Field by tapping it, adding {U}{U}{U}.
Activate Saryth by paying {1} and tapping it, untapping Lotus Field.
Activate Freed from the Real's second ability by paying {U}, untapping Saryth.
Repeat.

Infinite untap of creatures and lands you control

Freed from the Real

Lotus Field

Activate Gwenna by tapping it, adding two mana of any color that can only be spent to cast creature spells or to activate abilities of creatures..
Activate Saryth by paying {1} and tapping it, untapping Ioreth.
Activate Ioreth's second ability by tapping it, untapping Saryth and Gwenna.
Repeat.

Gwenna, Eyes of Gaea

Activate Lotus Field by tapping it, adding {U}{U}{U}.
Activate Saryth by paying {1} and tapping it, untapping Lotus Field.
Activate Pemmin's Aura's first ability by paying {U}, untapping Saryth.
Repeat.

Pemmin's Aura

Activate Yuna by tapping it, adding {1} and causing the next creature spell you cast to enter with two +1/+1 counters on it.
Activate Saryth by paying {1} and tapping it, untapping Ioreth.
Activate Ioreth's second ability by tapping it, untapping Saryth and Yuna.
Repeat an arbitrarily large number of times.
Cast a creature spell, causing it to enter the battlefield with infinite +1/+1 counters due to Yuna.

Infinite +1/+1 counters on a creature

Yuna, Grand Summoner

Activate Marwyn by tapping it, adding at least {G}{G}.
Activate Saryth by paying {1} and tapping it, untapping Ioreth.
Activate Ioreth's second ability by tapping it, untapping Saryth and Marwyn.
Repeat.

Combos with "Saryth, the Viper's Fang"