In a game between two humans.
I play
Jeering Homunculus goading the opponent's
Sorceress Queen.
During the opponent's Declare Attackers face he was not required to attack with the
Sorceress Queen.
In fact, he was not allowed to.
Game Log6:29: Turn 13 Envy (13 - 19)
16:29: Ability triggers:
Puca's Mischief [e59] - At the beginning of your upkeep, you may exchange control of target nonland permanent you control and target nonland permanent an opponent controls with an equal or lesser converted mana cost. - targeting
Shimmering Wings [395]
Guul Draz Assassin [9c3]
16:29: Envy draws a card
16:29: Envy casts
Jeering Homunculus [b8c]
16:29: Envy puts
Jeering Homunculus [b8c] from stack onto the Battlefield
16:29: Ability triggers:
Jeering Homunculus [b8c] - When
Jeering Homunculus [b8c] enters the battlefield, - targeting
Sorceress Queen [010]
16:29: Envy is goading
Sorceress Queen [010]
16:29: Envy puts
Island [fb8] from hand onto the Battlefield
16:29: Envy plays
Island [fb8]
16:29: Envy attacks with 0 creatures
16:29: Turn 14 Perdition (13 - 19)
16:29: Perdition draws a card
16:29: Perdition puts
Swamp [c78] from hand onto the Battlefield
16:29: Perdition plays
Swamp [c78]
16:30: Perdition attacks with 0 creatures