The watermarks are future sight type symbols

Resistance https://github.com/svn2github/MagicSetEditor/blob/1904cac4a7719f63eea4a8c10442ff5ec48d504f/data/magic-watermarks.mse-include/futsymbol_enchantment.png?raw=true

Enforcers https://github.com/svn2github/MagicSetEditor/blob/1904cac4a7719f63eea4a8c10442ff5ec48d504f/data/magic-watermarks.mse-include/futsymbol_planeswalker.png?raw=true

Synths https://github.com/svn2github/MagicSetEditor/blob/1904cac4a7719f63eea4a8c10442ff5ec48d504f/data/magic-watermarks.mse-include/futsymbol_creature.png?raw=true

Mutants https://github.com/svn2github/MagicSetEditor/blob/1904cac4a7719f63eea4a8c10442ff5ec48d504f/data/magic-watermarks.mse-include/futsymbol_sorcery.png?raw=true

Remnant https://github.com/svn2github/MagicSetEditor/blob/1904cac4a7719f63eea4a8c10442ff5ec48d504f/data/magic-watermarks.mse-include/futsymbol_artifact.png?raw=true