Shift click to unstack.
Like most currency items, Portal Scrolls can be dropped by slain monsters, chests, and destructible containers (barrels, crates, pots, urns). A Portal Scroll can also be obtained by selling 3 Scrolls of Wisdom to Nessa.
Carrying Portal Scrolls is usually recommended unless a player is using the Portal skill gem. Players may also use Portal Scrolls to go in and out of town, to immediately refill flasks and heal to full while in the middle of combat. However, this strategy has limited value in a map since the number of portal trips is limited to six.
Because Portal Scrolls are quite common, it is typical for players to use Portal Scrolls more slowly than the rate at which they drop.