Tharkon
commented
3 years ago Welcome to Github.
You seem to be mixing up controller and owner a bit in your post but it is still understandable what you mean. I want to point out that the situations are quite different though. The Scarab God's ability creates a token, so you are the owner of that token. While Sower of Temptation gives you control of a creature owned by another player, which may or may not be a token.
I was able to replicate the second bug with this setup: battlefield:Human:Swamp:5 battlefield:Human:Island:5 graveyard:Human:Olivia Voldaren:1 battlefield:Human:The Scarab God:1 battlefield:Computer:Bloodbond Vampire:1
As well as with this one: battlefield:Human:Swamp:5 battlefield:Human:Island:5 battlefield:Human:Olivia Voldaren:1 hand:Human:Quasiduplicate:1 battlefield:Computer:Bloodbond Vampire:1
So it seems that is has to do with it being a token and specifically a token of Olivia Voldaren. If I use The Scarab God on a Roil Elemental I was unable to reproduce the bug, but did discover another. When I sacrificed the Roil Elemental token to a Carrion Feeder or destroyed it with Go for the Throat, the creature I took was not returned.
IsoGumby
On two separate occasions with two separate sets of cards, a player within my EDH pod would gain control of a card that had a "for as long as you control X" creature, and its effect would fail to resolve when the correct conditions became true. In the first example, a roil elemental was taken via Sower of temptation's enter the battlefield effect. Afterword, a land was played by the new controller of Roil Elemental which says "Landfall - when a land enters the battlefield under your control, you may gain control of target creature for as long as you control roil elemental". The prompt was given to the controller, who selected yes. The creature targeted by roil elemental did not have its' control changed to the current owner of roil elemental. Because the game would have ended with this play, we allowed it to continue for testing purposes, and the effect happened multiple times with each land drop made by the new controller. In the second example, an Olivia Voldaren was reanimated from an opponents' graveyard using the scarab god's activated ability. A vampire was targeted by Olivia Voldaren's second activated ability which states "3BB: Gain control of target vampire for as long as you control Olivia Voldaren". It was a legal target, and the ability was allowed to resolve. The control of the targeted vampire was not changed to the current owner of Olivia Voldaren as it should have been.
Thanks for all you guys do! Be safe :)