Manacept

So, some cards suck. They have generic, or weak effects and need redesigning. Any ideas would be welcome. Here is a list of the cards.

Thor
Fencer
Griffon
Sky Serpent
Serpent Of The Deep
Infernus
Fallen Angel
Scylla
Dragon Captain
Dragon Knight
Dragon Guard (These 3 need to work as some kind of combo)
Wandering Warrior
Ninja Assassin
Pirate Chef
Pirate Captain
Pirate (These will be either an archetype or mini archetype)
Treant
Corrupt Treant
Mummy

All ideas are welcome. But explain it, in detail.