Another issue for card design is that the gameplay of Magic itself has a lot of math
Helldozer Helldozer isnt the most efficient creature in terms of rate and size, but if you can activate twice each turn to nuke two nonbasics, maybe your opponents will be pressed to do something about it very quickly
Aura Shards (with a Handwave to Sterling Grove): Both of these enchantments are in the same set, color combination, and rarity, and yet they do very different things
Also, when they transform into Hollowhenge Huntmaster, they become a 6/6 that gives all of your permanents hexproof, and then also puts two +1/+1 counters on all of your creatures in your combat step
Theyre a three mana Green and Blue 2/2
Uthros, Titanic Godcore is the blue option, letting you add blue mana equal to the number of artifacts you control (hello, Tolarian Academy), and Evendo, Waking Haven is the green Planet card, and does the same but with green mana and creatures (like Gaeas Cradle)