Three mana is costly to hold up, so unless you can shave the mana cost with something like Jet Medallion, or have other mana sinks you use in case you dont need to cast it, Id hesitate to put it in your deck
With lots of options in the card pool to ping bits of damage off your opponent (notably Skeleton Archer), it was a cheap body you could return to your hand over and over again with great consistency
Thats understandable, since Ring of Ma'rf was the first go at this effect by WotC
As part of Dark Ascension, Mikaeus cant be used in standard, but hes perfect for running a shambling black commander deck
This dispenser design is stack ready or can be placed side by side, allowing you to expand by 3 slots at a time
Metagross- As far as I was excited for this, seems pretty niche, base 130 damage is ok for stage 2 and 3 energy (steel is a little hard to ramp though) Skyla- Probably ok, no reason to make switch cards into a supporter unless the stage 1 is very hard to retreat Wally- probably made just for Gallade, but makes attacks way easier to ramp Rainbow cave- the cope for horrible rng reduction, seems good though because with dragonair you can basically ramp 2 energy for free every turn for dragon types Potential Steven supporter to pair with metagross maybe