Cry Havoc!

Edison Card Text
You can remove from play 1 monster from your GY to Normal Summon or Set 1 Normal Monster from your hand. You can only activate this effect during your Main Phase.
No targeting
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●You can activate (flip face-up) Cry Havoc! during any Game Phase, but you can only activate its effect during your Main Phase.
●Removing 1 monster in your GY from play is a cost to activate the effect of Cry Havoc!.
●If you Set a Normal Monster with the effect of Cry Havoc!, you don't have to reveal it to your opponent.
●If you activate Double Summon during your Main Phase and activate the effect of Cry Havoc!, the Normal Summon or Set with Cry Havoc! does not use one of the 2 Normal Summons or Sets allowed with Double Summon.
edisonformat.com
You can activate (flip face-up) "Cry Havoc!" during any Game Phase, but you can only activate its effect during your Main Phase.
Removing 1 monster in your Graveyard from play is a cost to activate the effect of "Cry Havoc!".
If you Set a Normal Monster with the effect of "Cry Havoc!", you do not have to reveal it to your opponent.
If you activate "Double Summon" during your Main Phase and activate the effect of "Cry Havoc!", the Normal Summon or Set with "Cry Havoc!" does not use one of the 2 Normal Summons or Sets allowed with "Double Summon".