Ostrox is a great addition to a progression Hydra team as a Block Buffs champion, since he can permanently keep it up at 100% up time when set at the right speeds. An ability like that can definitely carry you far in that encounter while maybe not being quite an end game champion.
His A3 is a mini-cleanse as well with a 50% Increase Accuracy buff. Which can be useful in many areas of the game. The rest of his kit from his A1 to his passive is centered around sending debuffs back at your enemy attackers through reflect and debuff transfers.
Base Stats
Attacks 1 enemy. Has a 70% chance of transferring 1 random debuff from this Champion to the target.
Also heals the ally with the lowest HP by 10% of this Champion's MAX HP.
Damage Based On: [ATK]
Multiplier: 3.9*ATK
Lvl. 3 Damage +5%
Lvl. 4 Buff/Debuff Chance +10%
Lvl. 5 Buff/Debuff Chance +10%
Lvl. 6 Buff/Debuff Chance +10%
Attacks all enemies.
If 3 or fewer enemies are alive, has a 75% chance of placing a [Block Buffs] debuff on each enemy for 2 turns.
If 4 or more enemies are alive, has a 75% chance of placing a [Block Buffs] debuff on each enemy for 3 turns.
Damage Based On: [ATK]
Multiplier: 3*ATK
Lvl. 3 Damage +10%
Lvl. 4 Buff/Debuff Chance +10%
Lvl. 5 Buff/Debuff Chance +15%
Lvl. 6 Cooldown -1
Removes 1 random debuff from all allies and places a 50% [Increase ACC] buff on them for 2 turns.
Lvl. 3 Cooldown -1
Whenever an enemy attempts to place a debuff on this Champion, has a 20% chance to reflect it back onto the attacker.
AURA
Ally ACC all Battles 40%