Great design, and the cards are easy to read
As long as its on the battlefield, a permanent entering the battlefield will have its ETB trigger countered unless the controller pays two mana
There have been calls to ban it, but I don't think it was ever the real problem
Protection 1-3 Moreover, apart from the optimal ratios and all the math, I would like to discuss some different categories like synergy and flavor
Compared to most other attempts at free designs in Magic history, the X-cost caveat is an absolute masterstroke, adding an important wrinkle for deck builders which still leads to usefulness both in fair decks and less fair ones
A card that has been in a certain flavor of green and black decks for quite some time, Hermit Druid provides one of the cheapest and easiest ways to fill your graveyard