Voucher upgrade pairs

How to use the 16 voucher upgrade pairs as a shop planning map: know which base voucher must come first and when the Plus version can appear in shops.

Guide highlights

Core idea

Many vouchers form first-stage and upgrade pairs. The first purchase is often a down payment on the second, stronger effect.

Planning flow

Start from the vouchers collection to see all 16 upgrade pairs.
Open the first-stage voucher before buying the upgrade target.
Reserve money for the pair only if it supports your current build.

Blank into Antimatter is the cleanest example because the payoff is an extra Joker slot.