Ice Caves of Phyrexia

When Ice Caves of Phyrexia enters the battlefield, sacrifice it unless you pay {w}{u}{b}{r}{g}.
{t} Add 5 of {c}{s}{p/w}{p/u}{p/b}{p/r}{p/g} in any combination.
At the beginning of your upkeep, if you control 4
or more lands, sacrifice Ice Caves of Phyrexia.
Wondrous.