Say I were to take some Terraformer Seeds and put a whole bunch of X traps under a player, is that allowed? It seems a little unbalanced
It's allowed, but remember that players only take damage by entering a trap tile or by remaining in one;
summoning a trap underneath a player doesn't count as damage.It's important that the current wording of Terraformer Seeds cannot affect tiles that are not mentioned in its list; for example, cave/pitfall entrances and exits, Tree tiles, wall tiles, and '?' tiles are immune to any changes performed by Terraformer Seeds, unless they are destroyed beforehand.
It could be changed to not affect 'X' tiles, but this allows players to
remove 'X' tiles for more cumbersome areas instead (i.e. - see the map for details).