Legendary Weapons in BI?

[player1]

Let's see:

Trigger trigger_spear_of_longinus
    WhenToTest CharacterTurnEnd
    Condition IsGeneral
          and not EndedInSettlement
          and RemainingMPPercentage > 50
          and Trait ChristianProselytism >= 1
          and FactionType empire_east
          and not WorldwideAncillaryExists spear_of_longinus
          and Trait Christian >= 1
          and not InUncivilisedLands

    AcquireAncillary spear_of_longinus chance  10

If playing ERE, this one should not be too difficult to get if "agreesive" christian you have doesn't take full move action.

Trigger trigger_sword_in_the_stone
    WhenToTest CharacterTurnEnd
    Condition FactionType romano_british
          and IsFactionHeir
          and IsGeneral
          and Attribute Command >= 2
          and Trait Christian >= 1
          and Trait ReligiousMania >= 1
          and RemainingMPPercentage = 100
          and I_TurnNumber >= -726 
          and I_TurnNumber <= -726 

    AcquireAncillary sword_in_the_stone chance  15

Impossible, an easter egg I would say.
By the way -726 is 1 AC, the birth of Christ.

Trigger trigger_spear_of_wotan
    WhenToTest CharacterTurnEnd
    Condition IsFactionLeader
          and IsGeneral
          and Attribute Command >= 4
          and FactionType saxons
          and not InEnemyLands
          and not WorldwideAncillaryExists spear_of_wotan
          and Trait Pagan >= 1
          and Trait PaganConversion >= 1

    AcquireAncillary spear_of_wotan chance  12 

;------------------------------------------
Trigger trigger_sword_of_chinglu
    WhenToTest CharacterTurnEnd
    Condition IsFactionLeader
          and IsGeneral
          and Attribute Command >= 4
          and FactionType huns
          and not InEnemyLands
          and not WorldwideAncillaryExists sword_of_chinglu
          and Trait Pagan >= 1
          and Trait PaganConversion >= 1

    AcquireAncillary sword_of_chinglu chance  10

These two hun and saxon speicific weapons are very difficult to get.
First, it must be faction leader, second it needs to have lots of command starts (not easy in BI), and third character needs to gain PaganConversion trait, only gainable in roman temples and in one of sarmatian temples. That's makes getting theses very rare.