boost box o2 Cell Phone 9362 Enterprise Boostbox Cost Getting started< Boost Oxygen offers supplemental Oxygen in non Boost Oxygen Natural Energy Breathing

It can also trigger House Dragonmaid's monster destruction effect

You could also use Mask Change II on Myutant M-05 or ST-46 to summon Masked HERO Acid if your opponent has a field stacked with lots of spells and traps that need to be destroyed

This screenshot is from a different fight but I want to point out that I'm not sure if Kari's I'm not sure if her DIGIVICE is the best, or the worst, it's the only one to not be outclassed by Monzaemon but look at the condition for it to work

In case you've never played with the Delve mechanic before, this alternative cost often allows you to cast cards for a very low price with no deck building requirements necessary

The rainbow cards are colorful additions to any TCG set, but they lack the beauty of alternate art cards, which is why they do not have the same price ceiling