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Consuming Blob's power is equal to the number of card types among cards in your graveyard and its toughness is equal to that number plus 1.
At the beginning of your end step, create a green Ooze creature token with "This creature's power is equal to the number of card types among cards in your graveyard and its toughness is equal to that number plus 1."
Consuming Blob counts card types, not individual cards. If the only card in your graveyard is an artifact creature card, Consuming Blob will be 2/3. If the only cards in your graveyard are ten artifact creature cards, Consuming Blob will still be 2/3.
If an instant or sorcery spell deals damage to Consuming Blob or reduces its toughness to 0, that spell is put into its owner's graveyard before state-based actions are performed. If that card is the first of its type to enter the graveyard of Consuming Blob's controller, it will raise Consuming Blob's toughness before the game checks to see if it dies.
The ability that defines Consuming Blob's power and toughness works in all zones, not just the battlefield. If Consuming Blob is in your graveyard, it will count itself.
The above rulings are also true for Consuming Blob's children (except the first one, as Junior tends to not hang out in graveyards).
The card types in this set that can be in a graveyard are artifact, creature, enchantment, instant, land, planeswalker, and sorcery. Some older cards also have the card type tribal. Legendary, basic, and snow are supertypes, not card types.
