Sower of Temptation says you "gain control of target creature for as long as Sower of Temptation remains on the battlefield."
Would this mean that you would also control the Bushfire Elemental after exchanging control with the Lovestruck Beast? Making it so you would control all three of the creatures: Sower of Temptation and Lovestruck Beast permanently, and controlling Bushfire Elemental until Sower of Temptation leaves the battlefield?
I don't know much about rulings but I can't see why this wouldn't happen.
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-MadMage
If you gain control of Bushfire Elemental, then with The Trickster-God Heist, exchange control of that permanent and Lovestruck Beast, the new controllers of the exchanged permanents would control the corresponding permanent indefinitely (C.R. 611.2a), even after Sower of Temptation leaves the battlefield in this scenario.
Although the effect from Sower of Temptation is still present on Bushfire Elemental, that effect is overridden by the effect of The Trickster-God Heist, which has no duration and started after that of Sower of Temptation (C.R. 611.2a, 613.7).
Effects that make a player "gain control" or "exchange control" of something are continuous effects whether or not they say how long they last (C.R. 611.1, 611.2a, 613.1a).
Sower of Temptation says you "gain control of target creature for as long as Sower of Temptation remains on the battlefield."
Would this mean that you would also control the Bushfire Elemental after exchanging control with the Lovestruck Beast? Making it so you would control all three of the creatures: Sower of Temptation and Lovestruck Beast permanently, and controlling Bushfire Elemental until Sower of Temptation leaves the battlefield?
I don't know much about rulings but I can't see why this wouldn't happen.
Using card tags is mandatory in the Magic Rulings forum. Please check your private messages to learn how to use them. I've added them for this post.
-MadMage
If you gain control of Bushfire Elemental, then with The Trickster-God Heist, exchange control of that permanent and Lovestruck Beast, the new controllers of the exchanged permanents would control the corresponding permanent indefinitely (C.R. 611.2a), even after Sower of Temptation leaves the battlefield in this scenario.
Although the effect from Sower of Temptation is still present on Bushfire Elemental, that effect is overridden by the effect of The Trickster-God Heist, which has no duration and started after that of Sower of Temptation (C.R. 611.2a, 613.7).
Effects that make a player "gain control" or "exchange control" of something are continuous effects whether or not they say how long they last (C.R. 611.1, 611.2a, 613.1a).
See also this thread.