mtg cards like fling MTGNexus Fling deals damage equal to the sacrificed creature’s power to target creature or player. Best Fling Cards in Magic:

If a basic land you control gains another basic land type or gains another ability that lets it produce mana, consider those effects when determining what colors of mana that land can produce

Some claim he's overrated and Stormbreath Dragon is still the other way to go

Cards like Sword of Fire and Ice or Blackblade Reforged create situations where opponents face impossible choices between playing spells and feeding your hand with cards

Its a Commander with a ton of value (Im looking to squeeze him into another underwater-themed deck as we speak), but theres also Kindred Discovery in the deck as well to get even more card draw from your Merfolk

A booster pack of Unstable retails for $4, so right now these are making up between 50% and 100% of the overall pack value

So build your own Commander deck, and go have some adventures with it