These defender-centric decks often win with Assault Formation effects that allow creatures to deal combat damage based on their toughness and enable defenders to attack
Eumidian Wastewaker Whenever Eumidian Wastewaker attacks, it makes both you and your opponent discard or sacrifice, often turning extra lands into card draw
If you want to play a deck with more than one color, you'll need some land capable of producing each color you play
And the escape cost isnt too bad, either
This opens it up to including reprints of older cards, such as The First Chapters Elsa, Snow Queen, which is being reprinted in Fabled as an epic
But online, its possible for the programmers to make changes as often as they like