Radianite Spike

Vanishing 3 (This artifact enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from
it. When the last is removed, sacrifice it.)

When all time counters are removed from this
artifact, at your end step, destroy all creatures you
control that weren't created this turn. Exile all
opponent creatures, artifacts, and enchantments.
This artifact cannot gain time counters after it
gains them from its vanishing effect.