When Normal Summoned, cards and effects cannot be activated
When another face-up Dragon monster(s) you control returns to your hand (except during the Damage Step): You can target 1 monster your opponent controls
Simply put, once Called by the Grave targets and banishes a monster, it negates all of that particular monsters effects, as well as any activated effects of monsters with the same original name and all effects of monsters with that same original name that are on the field
that the higher your level, the stronger you are
Aside from the 4000DEF wall, this monster can also banish one of your Invoked monsters from the Field or Graveyard, and banish any of your opponents monsters with the same attribute
Combined, its a cant miss, all-foil Summer Dueling blockbuster