Q: I have a "Gearfried the Red-Eyes-Iron Knight" and a set "Blast with Chain". My opponent has a monster and "Creature Swap". My opponent activates "Creature Swap" and I chain "Blast with Chain" to target the "Gearfried the Red-Eyes Iron Knight". How does this chain resolve? Who gets to activate the trigger effect of "Gearfried the Red-Eyes Iron Knight"?
A: "Blast with Chain" resolves, equipping to Gearfried. Then "Creature Swap" moves Gearfried to the opponent's field. Now the player who currently controls "Gearfried the Red-Eyes Iron Knight" can trigger it's effect to destroy the equipped "Blast with Chain" and optionally another Spell/Trap on the field.