Tenebris Nemo, Arbiter of Time

When this permanent transforms into Tenebris Nemo, Arbiter of Time, put four time counters
on each other nonland permanent. They gain vanishing (At the beginning of your upkeep, remove a time counter from this permanent. When the last is removed, sacrifice it.)
When Tenebris Nemo attacks, choose one:
-Proliferate
-Lessen (Remove a counter from any number of target permanents and/or players.)