Please help

[DarklordX89]

So im trying to remake hypixel skyblock and right now im doing the mobs but when i tryed to do
spawn a Guardian
set {seaguardian::%spawned Guardian%} to true
set the name of the spawned Guardian to "&7Lv:15 &3Sea Guardian"
it did not work please help me

 

[RedstoneGamer54]

set name of last spawned guardian to "Example"

 

[DarklordX89]

but
i cant spawn a guardian in 2.1.2

 

[RedstoneGamer54]

but
i cant spawn a guardian in 2.1.2

spawn guardian at player's location