The World Tree

The World Tree enters tapped.
{T}: Add {G}.
As long as you control six or more lands, lands you control have "{T}: Add one mana of any color."
{W}{W}{U}{U}{B}{B}{R}{R}{G}{G}, {T}, Sacrifice The World Tree: Search your library for any number of God cards, put them onto the battlefield, then shuffle.

Secret Lair Drop

The List

Magic Online Promos

Kaldheim Promos

The World Tree’s third ability doesn’t cause lands you control to lose any of their abilities. It also doesn’t cause lands you control to gain or lose any land types.