Cause it saids on those cards
During The End Phase Of a Turn that this card destroyed a monster as a result of battlesend this card to the graveyard to summon LV4 /Lv6 depending on the card but its effect i believe isnt considered destroying a monster as a result of battle someone pLMK

If you use the effect to destroy a f/d monster, you don't get to summon the next level.

OTOH, if you destroy a monster in battle (damage calculations) it's gone at the end of the turn. I hope you have the next level in your hand or deck...

The Level Effects of getting the Next Monster ARE optional. They are NOT madatory, notice that the word to makes it optional. If you want futher confirmation this has been discussed before and by using the search engine I am sure you will find simlar answers to mine.

Mystic Swordsman LV2
Effect Monster (Warrior / EARTH / 2 Stars / ATK 900 / DEF 0)

If this card attacks a face-down Defense Position monster, destroy the monster immediately with this card's effect without flipping it face-up or applying damage calculation. During the End Phase of a turn that this card destroyed a monster as a result of battle, send this card to the Graveyard to Special Summon 1 "Mystic Swordsman LV4" from your hand or Deck.

Ok Thanks Guys People Keep telling Me Its Not Opitional Thanks.

you just have to remember that if you destory a face down monster your not destroying it as a result of battle you are destroying it with it's on effect just like that URjustSOL said but yes it is optional if you want to send it up to the next level, and if you have the next level it's probably in your best interest to do so

I can't find any rulings on-line about this. I would have sword a Judge at a recent Regional ruled that the effect was mandatory, but I see a post (on another site) by someone I respect about Horus that the effect was optional.

I assume that Horus and Mystic Swordsman have the same ruling, so I'll defer to "optional" till something comes up on the UDE Judges list that says otherwise.

Will that suffice as enough Proof? Or do I need to ask a Netrep? Or Mr. Tewart and have them post here personally themselves? ;)

No need to ask a NetRep, since Tripping has answered the question already. Of course, I see that they added Mystic Swordsman and Horus to the UDE FAQ pages.

i think this is a no, but ill ask anyways.

if you attack a fd monster with lv.2/lv4, do you have to use there effect to destroy it attamaticly? because if not, it will be kinda hard to get them out.

Mystic Swordsman LV2
Effect Monster (Warrior / EARTH / 2 Stars / ATK 900 / DEF 0)

If this card attacks a face-down Defense Position monster, destroy the monster immediately with this card's effect without flipping it face-up or applying damage calculation. During the End Phase of a turn that this card destroyed a monster as a result of battle, send this card to the Graveyard to Special Summon 1 "Mystic Swordsman LV4" from your hand or Deck.

Mystic Swordsman LV4
Effect Monster (Warrior / EARTH / 4 Stars / ATK 1900 / DEF 1600)

If you Normal Summon this card, you must place it in face-down Defense Position. If this card attacks a face-down Defense Position monster, destroy the monster immediately with this card's effect without flipping it face-up or applying damage calculation. During the End Phase of a turn that this card destroyed a monster as a result of battle, send this card to the Graveyard to Special Summon 1 "Mystic Swordsman LV6" from your hand or Deck.


The Bold emphasis should answer your question.

Mystic Swordsman LV4 can be special Summoned and he will not go face down, Ditch and Revive, Marauding Captain, Familiar Knight or any means of Special Summon that is applicable.