Mystic of the Tides Creature — Merfolk Play with top card of your library revealed. As long as an Island is revealed this way, Islands you control produce an additional when tapped for mana and you may cast Merfolk creature cards from your graveyard. 1/3
Actually, it would conventionally be in the way. Merfolk aren't an expensive tribe. One could jump to the conclusion that the mana accell ability is excessive and of no use to Merfolk. However, it's really just a build around combo matera that lays the foundation for another Merfolk to be utilized in combination with it. The reason it casts Merfolk from the graveyard instead of the top is to limit the design. It's already got a specific use, it would be getting carried away to cast from the top like that. With Merfolk, it's much more useful to be able to get back what you've lost. By working with a much more limited resource (the graveyard) it balances out the ability while doubling as an amplifier.
Oracle of the Abyss Creature — Merfolk , : Look at the top X cards of your library, you may choose one, then shuffle the rest into your library and put the chosen card on the top if it. 0/3
For this design itself, normally you can scry so much more for less. Index and Ponder and Brainstorm all have high ratios. So normally, this wouldn't be any good. No one would pay one for one when they can get five for one or three for one plus net a card. However, when you've got double mana it cuts the price in half, making it more than efficient. Being a 0/3 for one itself is a great defense and provides a solid one drop creature that Merfolk has since lacked all these years.
I'm going to try and render these later. If I make any changes in the process, I'll update them for you.
They really do help and a merfolk like the one mentioned would be "meh" at best. As for the Mystic of the Tides card that was made, I agree that it would be excess to a merfolk deck but put that card outside of a merfolk tribe deck (lets say something like Leviathan) and it would be rather useful. The casting from the graveyard effect by its self would have been AMAZING in my eyes for a merfolk deck.
Willow Branch Ascetic Creature - Troll Shaman , : Scry 1 Whenever you put a card on the bottom of your library, put a +1/+1 counter on ~. 1/2 "From the past we gather future strength."
Pain Gatherer Adept Creature - Troll Shaman : Each player puts the top card of their library into their graveyard. , Sacrifice ~: Cast target card in a graveyard without paying its mana cost. Play this ability only anytime you could play a sorcery. 1/2 "Many possible futures, one harsh reality"
I really hope they make trolls a major race in some upcoming block.
Thallid Overmind Creature - Fungus Fungus spells you cast cost less Other Fungus creatures you control get +1/+2 and saproling creatures you control get +1/+2 At the beginning of your upkeep, put two 1/1 green Saproling creature token onto the battlefield for each fungus creature you control. 5/6
Thallid Propagator Creature - Fungus At the beginning of your upkeep, put a spore counter on thallid propagator. Remove three spore counters from thallid proagator: Put a 1/1 green Saproling creature token onto the battlefield. sacrifice a Saproling: if an effect from a fungus creature you control would put one or more saproling tokens onto the battfield, it puts twice that many saproling tokens instead until the end of the turn. Activate this ability only once each turn. 2/2
Fungal Symbiosis Tribal Enchantment - Fungus As an additional cost to cast Fungal Symbiosis, tap 1 Fungus creature on the battlefield under your control. Enchant land Whenever enchanted land you control is tapped for mana, for each other land you control with the same name, Put a 1/1 green Saproling creature token onto the battlefield.
Spreading Mycelium Tribal Sorcery - Fungus As an additional cost to cast Spreading Mycelium, tap a fungus creature you control and sacrifice a saproling. Search your library for up to two basic land cards, reveal those cards, and put one onto the battlefield tapped and the other into your hand. Then shuffle your library