It's significantly more likely to brick or create an underwhelming board, and it has close to no recoverability, often conceding to a resolved Tribe-Infecting Virus
So Leafeon is a pretty impressive Pokmon card, and definitely earns its place in this list
If the target creature's power is no longer less than the attacking creature's power as the ability resolves, mentor doesn't add a +1/+1 counter
If you do, create a 1/1 blue Merfolk creature token
The rare collectible belongs to the expansion's alternate-art subset and has a holographic illustration that is bursting with vibrant colors
The nice thing about Hex Parasite though, is that you can keep doing it so long as you always have mana open to pay the cost, especially if you pay the phyrexian mana with life instead of mana