Elysium, Promise of Eternity

Undying, Starbound. (This creature can block creatures with flying and starflight).
Non-god, non- artifact creatures you control have undying.
Phenomenon— Once per turn, flip a coin. If
heads, remove a +1/+1 counter on up to four
other creatures you control.
If you successfully activate the Phenomenon
ability of this creature, remove all +1/+1 counters
on it.