A time portal is the place you spawn in the world. You can craft stuff from it, like pickaxes and upgrades.
You can build a portal at a level 2 workbench. You need 1 stone and 120 TC.
A portal can be used to make a trade portal at a portal for 1 gold coin, 100 TC, and a portal.
A portal can be used to make a Portal Chest at a diamond-upgraded portal for 1 gold chest, 100 TC, and a portal.
Otherwise can be used normally