Completely new abilities? Let's do this. Are you thinking defensive or offensive? I'll do all.
![Entropy :entropy](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/entropy18x18.png)
Gamble: Every time target creature uses its skill, it becomes -1|-2.
![Death :death](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/death18x18.png)
Ritual: Sacrifice target creature. Ghost Stallion gains +1|+1.
![Gravity :gravity](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/gravity18x18.png)
Galvanize: Target creature becomes -2|0 but gains Momentum.
![Earth :earth](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/earth18x18.png)
Block: Target loses 5 HP. Anything that targets it has a 25 % chance of missing and attacks directed at it also have a 25 % chance of missing. Can target players or creatures.
![Life :life](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/life18x18.png)
Sympathy: This creature becomes -1|-1. Target creature gains +3|+3.
![Fire :fire](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/fire18x18.png)
Frenzy: Target creature becomes +1|-1.
![Water :water](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/water18x18.png)
Tidal Wave: Target creature becomes 0|-2. Gain
![Water :water](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/water18x18.png)
.
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
Advent: Target creature gains +1|0 for every card summoned to the field.
![Air :air](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/air18x18.png)
Wings: Target creature loses its active ability and gains the Dive ability.
![Time :time](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/time18x18.png)
Revert: Target creature is restored to the form it was in when it was originally summoned.
![Darkness :darkness](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/darkness18x18.png)
Shadow Bond: Gain
![Death :death](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/death18x18.png)
. This ability can be used multiple times per turn.
![Aether :aether](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/aether18x18.png)
Mirage: Summon a copy of the target creature. The copy has 0 health.
Some ideas are similar or are simply pulled from other ideas I found in the forums. Their costs should be scaled due to their relative power. For example, Mirage is quite powerful and should cost 3
![Aether :aether](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/aether18x18.png)
while Frenzy is not too powerful and should cost 1
![Fire :fire](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/fire18x18.png)
.