Flying, trample
When Demonlord Belzenlok enters, exile cards from the top of your library until you exile a nonland card, then put that card into your hand. If the card's mana value is 4 or greater, repeat this process. Demonlord Belzenlok deals 1 damage to you for each card put into your hand this way.
6/6
Legalities
tlrnot legal
duellegal
brawllegal
pennylegal
PreDH
Rulings · 6
wotc
If the nonland card doesn't have a mana cost, its mana value is 0.
wotc
Demonlord Belzenlok's ability causes it to deal an amount of damage to you all at once; it doesn't deal 1 damage multiple times.
wotc
The mana value of a split card, such as a card with aftermath from the Amonkhet block, is equal to the combined mana cost of its two halves.
wotc
Notes
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Once the triggered ability resolves, the ability will continue until you either exile a nonland card with mana value 3 or less or fail to exile any nonland cards while performing the process. You can't choose to stop receiving the blessings of Demonlord Belzenlok any sooner.
wotc
If the mana cost of the nonland card includes {X}, X is considered to be 0.