Nibbles, 13 nibbles (6.5 bytes)

^10: ^10"*" '\n'

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Explanation

^10: ^10"*" '\n'    #
----------------------------------------
     ^10"*"         # replicate 10 times
   :         '\n'   # append
^10                 # replicate 10 times

Nibbles, 13 12 nibbles (6.0 bytes)

^10: ^10"*" "\n"

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Explanation

^10: ^10"*" "\n"    #
----------------------------------------
     ^10"*"         # replicate 10 times
   :        "\n"    # append
^10                 # replicate 10 times

-1 Nibble thanks to xigoi

Nibbles, 13 nibbles = 6.5 bytes

^10: ^10"*" '\n'

Explanation

^10: ^10"*" '\n'    #
----------------------------------------
     ^10"*"         # replicate 10 times
   :         '\n'   # append
^10                 # replicate 10 times

Nibbles, 13 nibbles (6.5 bytes)

^10: ^10"*" '\n'

Attempt This Online!

Explanation

^10: ^10"*" '\n'    #
----------------------------------------
     ^10"*"         # replicate 10 times
   :         '\n'   # append
^10                 # replicate 10 times