If I use Hostile Takeover on an opponent's Ferrous Forerunner, attack with it, then Hidden Blade it, do I keep the mech tokens created by its Deathknell ability and draw cards from Hidden Blade?

Ruling: Yes, you keep both the mech tokens from Ferrous Forerunner's Deathknell and draw 2 cards from Hidden Blade. You own and control the Deathknell effect when it triggers, and Hidden Blade looks back to see you were the controller when the unit died.

Sequence:

• Cast Hostile Takeover on opponent's Ferrous Forerunner at a battlefield
• Take control of Forerunner and ready it
• Move it into battle and win the showdown
• Cast Hidden Blade on the Forerunner
• Deathknell triggers under your control, creating 2 mech tokens for you
• Hidden Blade draws you 2 cards

Nuances:

• There is no effect that would return the tokens to the opponent since Hostile Takeover only returns the unit itself, not tokens created while under your control
• Hidden Blade "looks back" to the state the unit was in when killed, confirming you were its controller for the draw effect