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.

Q: If I give my opponent my "Zoma the Spirit" with "Creature Swap", then destroy it by battle, who takes the damage? A: The opponent of the owner of "Zoma the Spirit" would take the damage, since "Zoma the Spirit" activates in the GY.

Q: Can a "Gearfried the Iron Knight", under the effects of "Iron Grit", be selected for "Creature Swap?" A: For the effect of "Creature Swap", a player can choose a monster affected by "Iron Grit". In that case, switching control of it with an opponent's monster is impossible, so the effect of "Creature Swap" is not applied.