The Ancient Mariner

When Ancient Mariner enters the battlefield destroy target creature with flying
Islandwalk, indestructible, deathtouch
if a creature you control would be destroyed put a -1/-1 counter on The Ancient Mariner, that creature gains {w}{u}{b}, regenerate this creature
If an effect would remove this card from the battlefield you may instead exile The Ancient Mariner until your next endstep, it comes back with all counters removed
Penance of life will fall onto him