Goat format ruling
Dreamsprite

Card effect (current official text)When attacked by your opponent's monster, select another 1 of your Monster Cards and designate it as the attack's target, then calculate damage.
Rulings
- The effect of Dreamsprite is not optional so if you have at least 1 other monster on the field when Dreamsprite is attacked, the attack target is changed to your other monster. This is also true if Dreamsprite is attacked when face-down.
- If your Dreamsprite equipped with Ring of Magnetism is chosen as an attack target, and you control another monster, the effect of Dreamsprite will still change the attack target to your other monster.
- If you control Dreamsprite, The Legendary Fisherman, and Umi is on the field, Dreamsprite’s effect can still change an attack target to The Legendary Fisherman because he is not being targeted with an attack, but is being targeted with a monster effect.
- If you control two Dreamsprites and one is attacked, you cannot continue to switch the attack target between the two Dreamsprites because the effect of Dreamsprite says that you must calculate damage on the new target.
- Q: Does the effect of "Dreamsprite" work the same as "Patrician of Darkness" where the attack can only be redirected to a legal target? A: Yes they are similar. The monster you switch the opponent’s attack to must be a legal target.
- Q: If I attack my opponent's face-down "Dreamsprite", can they redirect my attack after it is flipped face-up? A: Dreamsprite's" effect is activated even if attacked while set. Steve Okegawa, 02/18/04
- Q: If "Dreamsprite" redirects an attack to "Suijin", can "Suijin" use its effect to reduce the ATK of the monster to 0? A: Suijin’s effect could not be activated because it is no longer the target of an attack but the target of the effect of Dreamsprite.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.