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.

Infinite mana legendary creatures you control can produce

Infinite untap of legendary creatures you control

Gwenna, Eyes of Gaea

Ioreth of the Healing House

Saryth, the Viper's Fang

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 colored mana

Infinite untap of creatures and lands you control

Freed from the Real

Lotus Field

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 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 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"