Scion of Shared Success

As long as it's an opponent's turn, Scion of
Shared Success isn't a creature.
Whenever Scion of Shared Success enters the battlefield or attacks, you may untap all lands.
Whenever a player gains life, draws cards, or
creates tokens, each other player gains half as
much life, draws half as many cards, and creates
half as many of those tokens. Round down for
each.