Behind the Mask will overwrite any previous effects that set a creature or Vehicle's power and toughness to specific numbers
The same thing I said for the previous card applies for Disciples of the Inferno: This is very much a burn card
For example, Wine of Blood and IronWine of Blood and Iron is a repeatable way to double our commander's power, Fatal FrenzyFatal Frenzy doubles power and gives trample , and Temur Battle RageTemur Battle Rage grants double strike and trample
There were a few individual spells like Taste of Paradise, above, from Alliances , that did this before kicker came around, but kicker is what put this section on the map
The store pages for the app also confirm that players will be able to open two free booster packs per day, not dissimilar to other mobile card games like Yu-Gi-Oh: Master Duel
Similarly, Arcades draws you a card whenever a defender creatures enters the battlefield under your control