Total 17 kinds to collect
That said, Kaladesh has an unusually powerful common removal spell in [casthaven]Welding Sparks[/casthaven]: it kills almost everything at instant speed and with little to no possible mana disadvantage, and does in a color with some strong cheap creatures
The best cards from Zendikar Rising were the cycle of rares like Emeria's Call // Emeria, Shattered Skyclave that all clocked in at seven mana, which generally translated into it defaulting as a land unless you happened to draw it late in a stalled-out game
The real strength of Daze lies in how difficult and damaging it is to play around, in essence it is at its best when your opponent knows you have one but you don't have it in hand
In addition to shutting down an opponent's spell, upon being cast, Access Denied's controller creates a number of 1/1 flying Thopter tokens equal to the mana value to the countered spell
More crucially, its in blue