Kadosa, Game Master

Trample
Whenever Kadosa, Game Master deals combat damage to a player, roll a d20. When you do, look at the top 10 cards of your library. Put any number of permanent cards with total mana value X or less from among them onto the battlefield, where X is the result and the rest on the bottom of your library.

The Red Greatwyrm uses its breath weapon, you take 12d12 fire damage. - Kadosa, Game Master to a
level 5 party.