Land Tax is one of those nice cards that gets away with being significantly above a reasonable power level due to it having no proactive or threatening components
I wouldn't generally call that a drawback, except for the fact that, unlike with Bolas's Citadel or Gwenom, Remorseless, which offer spells-for-life as a bonus effect, it's possible to lock yourself entirely out of the game with Teval
If a nontoken creature an opponent controls would die, instead exile it and you gain 2 life
Will of the council cards only have one effect after voting is over, and that depends on what the majority picked
Many players use small six-sided dice for this purpose
If such things interest you, might I recommend starting here, here, here, here, and here?