The Egg of Progenitus

Hexproof, Defender
This card enters the battlefield with 10
incubation counters on it.
{1}: remove an incubation counter from this card.
When there are no incubation counters on this
card, sacrifice it and put a {w}{u}{b}{r}{g} legendary creature token on the battlefield named
Progenitus Reborn, it has protection from
everything and {10}monstrosity 10.
{5}{t}: add{w}{u}{b}{r}{g}