Focus

Description
On cast, the player gains 2 for the rest of the battle.

Strategy and Synergy
Since Spell Power increases spell damage by a flat amount, there are three different ways to capitalize on it effectively.

First, by using rapid-firing multi-shot spells. An example of this type of spell is and. Each individual shot will be affected by the amount of Spell Power the player currently has. Minnie Gun only deals 60 damage to a single target if all shots land by base, but with 10 Spell Power, it increases to up to 180 damage, triple of that of the base amount. If the player is lucky enough, they can even get to more powerful spells that scale better with Spell Power like and. It is worth noting however, that these spell tend to be on cast, meaning it will likely not reap the most benefits out of Focus.

is a spell that scales extremely well with Spell Power and doesn't Consume itself, but it wouldn't synergize well enough with Focus under most circumstances. The reason for this is due to how in Limit Break-central decks, the player is likely to be at 0, but Focus still requires at least a single point of to be cast. , despite neither being rapid-firing or multi-shot (although an enemy can still be hit twice), is a great combo with Focus as it still capitalizes on Spell Power gain to deal lots of damage and doesn't Consume itself.

Second, by using 0-cost spells that can easily be generated. This directly refers to builds and. These are the types of spells relies on their ability to be cast inconsequentially by utilizing their non-existent Mana cost and their great numbers of supply. This means that the player can easily 'spam' or repeatedly cast through all of them in rapid motion until they reach the end of the deck where they are forced to shuffle. Viruspell, due to its ability to duplicate itself on cast, is self-sufficient over a couple of shuffles while Kunais have multiple methods of generating them - all of which are eligible for the upgrade.

Increasing Spell Power would raise the flat damage of all spells that are thrown out without regard. Since each individual Viruspell or Kunai doesn't deal too much damage by themselves, an increase in flat damage is highly significant. Focus isn't necessarily high in cost, meaning these types of decks will still be able to spare some of the remaining Mana and will allow Focus to still fit within them.

Finally, is by using. Flame tiles deal 10 damage to whoever standing on it per tick (0.4s), but also scales with Spell Power and negative. This means an increase in 10 Spell Power would effectively double Flame damage and deals 20 damage per tick instead of just 10.