Services like Rally, Otis, and Collectable allow fractional ownership of high-value cards, democratizing access to investment-grade specimens that individual collectors couldn't afford alone
Dauthi Voidwalker An unblockable creature with three power for two mana is already pretty exciting for aggressive decks, as it'll come down early and do decent damage before it gets answered
In fact, pairing Zirda with Grim Monolith was powerful enough to get it banned in Legacy
These are just charms where each mode costs a different amount, so their flexibility is bound to make them strong
Another nice creature that I can cast during early turns is Hedron Crab : if I've got 2 on the battlefield in the 2nd 3rd turn I can mill 6 card per turn
That prevalence will warrant a double-ban in April, by all historical standards, and you don't want to hold the bag when that hammer comes down