Call of the Mummy

Edison Card Text
Once per turn, if you control no monsters, you can Special Summon 1 Zombie-Type monster from your hand.
Zombie World Structure Deck • 2008-10-21
No targeting
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●When you activate the effect of Call of the Mummy, you can Special Summon a high-level monster from your hand like Giant Axe Mummy or Vampire Lord, but not a Special Summon-only monster like Fushioh Richie.
●You can only activate Call of the Mummy’s effect during your Main Phase.
●You select a monster from your hand when you resolve Call of the Mummy’s effect, not when you activate the effect.
●If you have multiple copies of Call of the Mummy in play, you can only Special Summon 1 Zombie because when you try to activate the second Call of the Mummy, you now have a monster on your side of the field so its effect does not apply.
edisonformat.com
When you activate the effect of "Call of the Mummy", you can Special Summon a high-level monster from your hand like "Giant Axe Mummy" or "Vampire Lord", but not a Special Summon-only monster like "Fushioh Richie".
You can only activate "Call of the Mummy"’s effect during your Main Phase.
You select a monster from your hand when you resolve "Call of the Mummy"’s effect, not when you activate the effect.
If you have multiple copies of "Call of the Mummy" in play, you can only Special Summon 1 Zombie because when you try to activate the second "Call of the Mummy", you now have a monster on your side of the field so its effect does not apply.