Basically, they make it so that both spells and abilities that your opponents control cost an extra two mana to cast or activate if they target a Merfolk you control
Next on the list might be casual players who actually want to build decks around the cards, but I'm not sure how often this happens
It still asks us to sacrifice creatures, but at least it exiles them, which I consider to be legal for our purposes
Sometimes, youll focus heavily on your lands and get a huge mana discount on spells
If Ifrit has three or more lore counters on it, exile it, then return it to the battlefield (front face up)
will allow you to dome each opponent for 8 damage and then wheel for 8 new cards for as little as 3 mana, possibly with cascade by way of Abaddon the Despoiler if youve dealt enough damage this turn already