I suppose that an argument could be made with Training Grounds, but that is too much just to make the Kefnet the Mindful ability more cost effective
The lone blemish that the mechanic has is the existence of Alrund's Epiphany, and while that card maybe shouldnt have foretell printed on it, its intrinsically powerful enough that the mechanic isnt entirely to blame
If Starting Town enters during another player's turn, it'll enter tapped no matter how many turns they've taken
Collected Company Collected Company is one of the most popular cards for cheating small creatures into play, for just 4 mana at instant speed
Hidden Trials, the newest set from the FINAL FANTASY TRADING CARD GAME, is now on sale
But formats outside of standard will definitely take advantage of the opportunity to build up more damage with this card