Atheon, Time's Conflux

Vigilance, Menace
When Atheon, Time's Conflux enters the battlefield, send forth the supplicants (summon three 2/2 Supplicant creature tokens)
If Atheon, Time's Conflux were to take damage, prevent it and put that many tokens on Atheon.
At the beginning of your next end step, Atheon takes 1 damage for every token put on him this way.
When Atheon deals combat damage to a creature or planeswalker, exile it until Atheon leaves the battlefield.