Spark Harvest or Annihilating Glare are honestly only worth it if your deck is running any kind of sacrificial theme , but then they can be a great alternative to the usual Terror effects
If its too small, you might miss out on interesting combos or synergy
Repeat this loop for infinite combat phases, infinite untaps, and as many ETB/LTB effects as you want
Most gain additional abilities if an opponent loses life during the turn, such as Florian, Voldaren Scion, Famished Foragers, and Vampire Socialite
When the last is removed, you may cast it without paying its mana cost.) Suspend 3 (Rather than cast this card from your hand, you may pay and exile it with three time counters on it
Older cards are a little more interesting, as they are the closest thing we in the old school community have to foils