Tainted Grail: Conquest

The Apostate class is part of the Watchers of Tuathan faction, so fight using low cost Arrow (Red) cards to deal damage, Quiver (Orange) cards to draw more arrows in exchange for Ultimate charges and Maneuver (Blue) defensive and buff cards. Blue cards will also have one or more extra states that they will switch between every time the card is used (e.g. Feints side 1 gives 10 Armour this turn and 100% of Armour as Barrier, Feints side 2 (called Unbreakable Feints) gives 150% Armour as Barrier). Note that while you can generate a lot of Barrier each turn,any leftover will vanish at the begininng of your next turn. Cards stay flipped between battles, so you can save powerful uses for when you need them, or can avoid bad effects by using them before ending a fight. The Apostate unique ability is that instead of being discarded, cards that are Flipped will stay in your hand and can be played again. You will also draw an extra card for every 2 Blue cards that you play. The Apostate Ultimate flips every card that can be in your hand, as well as gives you a damage buff for the rest of the turn. Depending on how many charges you have, this buff will get bigger the more you have.

Combat as an Apostate is slightly more complex than a Sentinel, though the same idea applies. Use as many Feints/Unbreakable Feints as you need to avoid damage, then pelt the enemy with arrows. Don't use your Ultimate to deal damage, as you will be consuming the charges to instead draw more arrows through Quiver cards. Your deck should consist primarily of Arrow cards, with several additional Quivers and extra Maneuvers that grant you damage buffs (check all flips of a card before you take it, only take the ones with no detriment). In terms of Passive Skills, choose anything that boosts damage output, or provides you with extra Armour or Barrier. There are not really any must haves, as the Apostate cannot really hit massively high single damage numbers, it is more about the volume of fire you put out.

Fight every battle you see, you should reach level 20 in the third area, just before you fight the 3rd guardian.