Essence of Theros

When Essence of Theros enters the battlefield or turned face up, turn face down
all other Planes that don't share a type.

Enchantments cost {x} less, where X is the number of enchantments the player controls.

At the beginning of each player's turn, put an Ascension counter on each creature they control. Whenever a creature has Ascension counters equal to or greater than their power, that creature becomes an enchantment in addition.