Lystrosaurus

Enrage - Whenever Lystrosaurus is dealt damage, create a token that's a copy of Lystrosaurus.
If Lystrosaurus would be put into a graveyard
from play, create a token that's a copy of Lystrosaurus.
"The P-T extinction killed 95 percent of marine and
70 percent of terrestrial species. Lystrosaurus survived,
accounting for up to 95 percent of the remaining land
vertebrates in some areas."