Enchant creature
At the beginning of each upkeep, put a plague counter on Traveling Plague.
Enchanted creature gets -1/-1 for each plague counter on Traveling Plague.
When enchanted creature leaves the battlefield, that creature's controller returns Traveling Plague from its owner's graveyard to the battlefield.
Flying
Whenever a creature dealt damage by Vampiric Dragon this turn dies, put a +1/+1 counter on Vampiric Dragon.
: Vampiric Dragon deals 1 damage to target creature.
Whenever a green nontoken creature dies, that creature's controller may search their library for a card with the same name as that creature and put it onto the battlefield. If that player does, they shuffle their library.