Problems Passing a Drop Down Selection to Chatsetattr

Working on a DnD 5e OGL Powercard, trying to assign an inline roll to an attribute.  I know I have this completely wrong but don't know what to do to fix it.

!power {{
  --charid|@{selected|character_id}
  --target_list|@{target|token_id}
  --emote|@{selected|character_name} Casts a Spell!
  --emotefont|font-family: "Algerian"; font-weight: bold;
  --txcolor|#7fff00
  --bgcolor|#440000
  --corners|10
  --border|5px solid #000
  --erowtx|#000000
  --erowbg|#00ffff
  --orowtx|#ffff00
  --orowbg|#006400 
  --name|@{selected|character_name} Casts Cure Wounds on @{target|character_name}  
  --!Cure| [$Lvl1] ?{ Level|1st Level, [[ 1d8 + @{selected|wisdom_mod}]]|2nd Level, [[ 2d8 + @{selected|wisdom_mod}]]|3rd Level, [[ 3d8 + @{selected|wisdom_mod}]]|4th Level, [[ 4d8 + @{selected|wisdom_mod}]] }
}}
!modbattr  --charid @{target|character_id} --hp|+[[$Lvl]!!! {{description=HP recovered}}

Would appreciate some help...

You'll likely get the best help by finding the Power cards thread (which is still active) and posting there. people who know the syntax will see you message.

Thanks!