Mortelix, the Great Dragon

Vigilance, Trample

Blocking creatures don't deal combat damage except Mortelix.

When Mortelix attacks all allied creatures gain +4 toughness until your next upkeep.

Advent: Mortelix —{5}{g}{g}{g}{g}{t}: deal 5 damage to all opponent creatures and tap all opponent creatures with less toughness than Mortelix.