Here are a few more things to keep in mind for deck building: You can play more than 40 cards, but you really should stick to 40 if you can
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Lulu's first ability only cares about creatures attacking you, not planeswalkers you control or battles you protect
These colors can appear in the card's mana cost or its rules text
Deckbox keeps its card database updated and lets you filter by edition, condition, language, and foil status
This is a Sing Together Song that costs seven ink to play, but can have multiple characters sing instead, saving you a bunch of ink
As the game goes on, more and more Crusades hit the table, making guys like White Knight into potentially 6/6 first-striking monstrosities