Burden of Dreams

V17

{0}: You may have a creature with toughness 10 or greater climb Burden of Dreams. If it's toughness was 17 or greater, you gain 5 life. Activate during your turn.

When Burden of Dreams is topped, tap it. It doesn't untap during your untap step. You get an emblem with "Whenever you climb, proliferate twice, then you gain 10 life."