Weakness: Grass (x2) Reeistance: None Retreat: 1 114
That could be a card like Davriels Withering, which perpetually gives a creature -1/-2 if that card reduces a creature to 0 toughness or less and sends it to the graveyard, for example, the debuff will remain in effect even if a player is able to bring it back to battlefield (causing it to immediately die again)
The best part of this card is, it can sit on the playing field, taunting your opponent as a lifeline should they try anything crazy
Game pieces need some reasonable degree of access
following this, the player discards the remaining three
Making a land drop every turn is step one, but in Commander, "ramping" is the name of the game