Great Wyrm Theodorix

Menace
Whenever Magma Wyrm Theodorix dies, each
opponent discards two cards unless they pay 5 life
for each card they don't discard. Put all non dragon
creatures discarded this way on the battlefield under
your control. You gain life equal to the life lost this
way.

"It's said these land-bound dragons were once
human heroes who partook in dragon communion."