Original A and upgrade to S with 2x2 (4-square) SC slots shown.
To access Atlantid multi-tools you need to have completed They Who Returned and have 48 atlantideum to unlock the pillar at the monolith.
Original A and upgrade to S with 3L,1 SC slots shown.
To access Atlantid multi-tools you need to have completed They Who Returned and have 48 atlantideum to unlock the pillar at the monolith.
Original A and upgrade to S shown.
To access Atlantid multi-tools you need to have completed They Who Returned and have 48 atlantideum to unlock the pillar at the monolith.
Two slot arrangements shown at A and upgraded to S
Edit: You need to have completed They Who Returned to unlock Atlantid multi-tools and 48 atlantideum to unlock the pillar at the monolith.