Urza can make some massive token creatures every turn, and it's easy to cheat his commander tax, thanks to his affinity for artifact creatures
But it now looks like this is the new normal, as both the Final Fantasy Secret Lair and the Sonic Secret Lair have followed this pattern (for FF the rare bonuses were the evoke elementals)
Lands tend to stick around most games, and the flexibility of being able to make your opponents swing into not you' by offering them trample and haste might change the course of the game in your favor
I like that this ward ability scales if you change its power, but the three-mana version is just about the perfect aggro card: wins races, needs more than one answer, and is good both early and late
Power Plant (cut) Power 3 Design 3 This is just a bit annoying
This all changed with the printing of Deathmist Raptor in Dragons of Tarkir , a card that was powerful enough to encourage dedicated morph decks that included all three iterations of the mechanic