Unfortunately, the answer is yes
If you add +1/+3 to a 3/1, you get a 4/4
Converted mana cost is simply the sum total of all the mana a card costs, regardless of what kind of mana we're talking about
Frequently Asked Questions How much is Tome of Legends worth
Some Vintage and Legacy competitive scenes fully allow players to play with proxies because they understand that the meta evolves in a more meaningful way, or that theres going to be more competition if players can proxy fetch lands, original dual lands, or even power 9 pieces
Rainbow foil treatment, holofoil icons, and gloss-coated artwork that enhance the visual appeal