Goat format ruling
Greed

Card effect (current official text)Each time a player draws cards because of a card effect, they take 500 damage during the End Phase for each card drawn by the card effect.
Rulings
- The effect of Greed only applies to cards drawn while Greed was applying. If Jar of Greed is chained to Greed's activation, Jar of Greed (Step 2) resolves and you draw 1 card for Jar of Greed before Greed’s effect (Step 1) was applying, so no damage is inflicted during the End Phase. But if you chain Greed (Step 2) to Pot of Greed (Step 1), then Greed is applying before Pot of Greed resolves, so the activator of Pot of Greed takes 1000 damage from Greed.
- You can chain to the effect of Greed that inflicts damage.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.