mtg m14 booster box (36ct) Magic 2014 (M14) : Toys & Games and begin battling! Magic The Gathering Magic 2014

This does indicate some uncertainty, but there are also other indications that show this card's positive potential, especially in the Breya, Etherium Shaper lists

While many cards with cumulative upkeep have seen some play, this is one instance where an entire decks win condition is built around the mechanic and its ever-growing pressure to maintain payment

Nameless Race is just that, the total opposite of shapeshifters with changeling and cards like Mistform Ultimus

The restriction to CMC four or less is completely reasonable, and is tempered by the fact it can hit any nonland permanent, including Planeswalkers