Reed Richards, Mr. Fantastic

When Reed Richards, Mr. Fantastic enters the battlefield, you may search your library for a creature card with converted mana cost equal
to 4, reveal it, then put it into your hand, then shuffle your library.
{w}{w}{u}{u}, {t}: Tap up to two target creatures an opponent controls. Activate this only if you control another creature whose mana cost
is equal to 4.