Hi zach here sorry for not being able to post I was enjoyng myself in sanfransisco, calafornia well a mater of fact I’m still there. Well this is how to tell if a cards good:
If it is balanced , they tend to go by a standard like this: (I found this out for only creatures for now)
-If the power/toughness is 1/1 it would cost (1), and so on for the power and toughness, and if the creature is like a 1/3 balance it out that makes a 2/2. or if the creature is a 3/7 that makes a 5/5 or if it is a 1/4 that would be a 2/3 then count that as either (3) mana or (4) mana if it counts as 3 then it is good (excluding no other effects) and if it is 4 it is usually bad (excluding other effects)
If a creature power/toughness is 1/1 and it has another effect it usually costs (2) FOR JUST THE POWER/TOUGHNESS
-For each effect like a named effect- flying, trample, first strick, devour, ect… it will add (1) to the converted mana cost.
-If the creature has a mixed effect like- all creatures get +1/+1, when this comes into play destroy all creatures, when this creature attacks target creature losses flying, ect… thies will usually add (2) per mana cost.
-If the creature costs multiple mana it usually costs (1) less per extra mana, (1) colorless.
-If the creature has a negetive effect like: When this comes into play sacrifice a land, when this comes into play discard a card, whenever a player plays a spell or an ability on this creature sacrifice it, ect… The creature will cost (2) less mana.
This is usually how so a 3/3 for (4) would be normal and a 3/3 for (4) with flying is a good card and a 3/3 for (5) would be bad and ect,
Now to tell if a creature is good for standard is if it fits into the both the blocks that are in standard now a card would be good for both the shards of alara block and the morningtide/shadowmoor blocks.
Another way to show if a card would be good it would be good in any deck not just in a specific few. Like banefire works for almost any deck while progenitus would only be good in a deck made for it.
A card would be bad if it can only be used in a deck that works for that card.
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Now to tell if a card would cost alot is if it is good for one, using the balance method
It would cost something If it works in standard, otherwise it wont cost too much
If it has high power and toughness. ALOT of noobs like cards that are just sheer power no matter if it costs 1000000 to play they will put it into thier deck. usually something that has high power and toughness is 6/6 or higher.
If a card is good in a combo it would cost more or if the card is good in a set (usually 5) it would cost alot like the scarab set.
–That is all this has worked for me but you are not limited to this if something else has worked for you please let me know by e-mail czmtgblog@gmail.com or post a comment… which is hopefully a few lines below this last sentance.