Vengeful Traveller

Whenever an enemy creature is put into the
graveyard from play put a +1/+1 counter on
Vengeful Traveller and create a Blood token.
A Blood token is a colorless Blood artifact
token with "{1},{t}: Discard a card and
sacrifice this artifact: Draw a card."
{t}:Investigate(Create a colorless Clue artifact token
with "{2}: Sacrifice this artifact: Draw a card.")
"Maybe your corpse will reveal some secrets"