"Ixalli's fertile rays enliven us all. Each of us is a testament to the sun's strength and love."
—Chitlati, Lightning Rider

Verdant Sun's Avatar

Whenever this creature or another creature you control enters, you gain life equal to that creature's toughness.

The Lost Caverns of Ixalan Commander

Whenever Verdant Sun's Avatar or another creature enters the battlefield under your control, you gain life equal to that creature's toughness.

Commander 2021

Commander Legends

Ixalan Promos

The entering creature's toughness is determined as the ability of Verdant Sun's Avatar resolves. If that creature has left the battlefield, use its toughness as it last existed on the battlefield. If the creature's toughness was less than 0, your life total won't change.