Kenrith, the Returned King + Woe Strider + Great Whale
Kenrith, the Returned King
Woe Strider
Great Whale
Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite scry 1Infinite mana lands you control can produceInfinite untap of lands you control
How it works
Activate up to seven lands by tapping them, adding at least 4.
Activate Kenrith's fifth ability by paying 4, returning Great Whale from your graveyard to the battlefield.
When Great Whale enters the battlefield, it triggers, untapping up to seven lands.
Activate Woe Strider by sacrificing Great Whale, causing you to scry 1.
Repeat.
This clever loop revolves around Kenrith, the Returned King serving as a royal engine to repeatedly pull Great Whale straight out of your graveyard using his black reanimation ability. Every time Great Whale splashes back onto the battlefield, its enters-the-battlefield trigger untaps your lands to pay for the next activation, leaving you with a surplus of mana. Meanwhile, Woe Strider acts as the necessary executioner, giving you a reliable outlet to sacrifice the whale and fuel endless scry triggers while sending it right back to the graveyard to do it all over again.