If it's the mobile game,
You can create huge fluid storage by placing copper tanks in up to 3x3 grids and stacking them 32 blocks high.
This mod is best played on local or dedicated servers and may crash on extremely detailed custom campaigns like Chernobyl.
If you're asking about the popular 3v3 mobile battle arena game , a "MOD" typically refers to a modified APK (a version of the game altered by third parties to provide advantages like unlimited ammo or god mode).
