Cards used for attacks and skill activation
The on colour artifact lands are the best but you should still play all the off colour ones too
(Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) Whenever one or more goaded creatures deal combat damage to one of your opponents, create a Treasure token
Again, the seemingly current approach to building a cool rare or mythic is the same: staple on desired effects, in multiples, on a competitively-costed creature
Instead of relying solely on basic lands, dual lands help decks access the colors they need more consistently, which reduces the chances of stalled turns or uncastable spells
But remember that it is best to add cards that are similar in effects