From Archon Arcana - The KeyForge Wiki
Angry Mob • Sanctum • Creature • Uncommon • Before Fight: You may discard cards from the top of your deck until you discard an Angry Mob or run out of cards. If you discard an Angry Mob this way, put it into your hand. • Artist: Vladimir Kafanov • Card Number: MM:143
There are always at least 2 copies of Angry Mob in a deck.