[quote="greg503":22hin1c0][quote="Christen57":22hin1c0][quote="Jon-Stark":22hin1c0]Crackdown still targets and applies to the monster taken by change of heart, so when heart wears off it goes back to the owner of crackdown.
https://db.ygorganization.com/qa#19174 similar ruling[/quote:22hin1c0]
Hold on. Change of Heart doesn't work the same way Forbidden Lance does. Forbidden Lance makes the monster unaffected, and keeps it unaffected until the end of the turn, which is why it works the way that linked ruling says.
Change of Heart on the other hand, upon resolution, only attempts to apply its monster-stealing effect once, meaning Change of Heart doesn't continuously force the monster to stay under your control or prevent other card effects from returning that monster to opponent's control.
This is because Change of Heart's effect isn't continuous, so I'm pretty sure it would play out like this:
[list:22hin1c0][*:22hin1c0]You activate Crackdown taking control of opponent's Kuriboh[/*:m:22hin1c0]
[*:22hin1c0]Opponent's Kuriboh is now under your control[/*:m:22hin1c0]
[*:22hin1c0]Opponent activates Change of Heart targeting that same Kuriboh[/*:m:22hin1c0]
[*:22hin1c0]Kuriboh returns to opponent's control, then Crackdown immediately returns it back to your control a second time since Crackdown continuously applies its effect[/*:m:22hin1c0]
[*:22hin1c0]That same effect of Change of Heart will not attempt to steal back that Kuriboh a second time since Change of Heart doesn't attempt to apply its stealing effect more than once, meaning the Kuriboh will remain under your control due to Crackdown[/*:m:22hin1c0][/list:u:22hin1c0][/quote:22hin1c0]
Ah, but Change of Heart DOES continuously apply, like other lingering effects.[/quote:22hin1c0]
Yeah you're actually right, since I found this: [url:22hin1c0]https://www.formatlibrary.com/cards/Snatch_Steal[/url:22hin1c0]
[list:22hin1c0][*:22hin1c0]
If you control your opponent's monster with "Snatch Steal" and your opponent takes control of it with "Brain Control", the monster is returned to you during the End Phase.[/*:m:22hin1c0][/list:u:22hin1c0]
Says the opponent keeps the monster until Brain Control's effect expires, and
Brain Control works the same way as Change of Heart.