RaijiLudomon

Q:Can I use this card's [Main] effect to pay 2 cost even when I don't have any [Legend-Arms] trait or level 5 Digimon?

A:No, you can't. The activation conditions include paying 2 cost and placing this card as 1 of your [Legend-Arms] trait or 1 of your level 5 Digimon's bottom digivolution card, therefore the effect can't be activated just by paying 2 cost.

Q:Can I choose an opponent's Digimon with a "can't attack" effect as the target when I activate this card's [Main] effect?

A:Yes, you can. However, in such cases the "can't attack" effect prevents making the attack.

Q:What happens if there are multiple "[Start of Your Main Phase] This Digimon attacks" effects and they trigger simultaneously?

A:You activate the 1st effect from among the simultaneously triggered effects and attack. The 2nd effect can be activated before the counter timing, but because you can't declare another attack during an attack, you won't be able to attack using the 2nd effect, even if you activate it.

Q:What happens if this card's [Main] effect is activated on an opponent's Digimon with an "[Opponent’s Turn] This Digimon isn't affected by your opponent’s effects" effect?

A:A Digimon with a "this Digimon isn't affected by your opponent’s effects" effect can also be chosen as a target for this effect, therefore your opponent's Digimon will lose the "this Digimon isn't affected by your opponent’s effects" effect as soon as it becomes your opponent's turn, then it will be affected by this card's effect. As a result, the attack occurs at the start of the main phase.

Q:Can I trash this card itself from digivolution cards for this card's inherited effect?

A:Yes, that's correct.