In any given Meren sacrifice deck you should include Plaguecrafter, Victimize, Caustic Caterpillar, Viscera Seer, Accursed Marauder, and any other cheap way to get sacrifice triggers
Even if it will be challenging to build the card up to use its -7 ability, there is still a ton of utility in the other three
The Water Crystal Rarity: Rare TYPE: Legendary Artifact SUBTYPE: - CMC: 4 Mana cost: USD: $9.53 EUR: 4.76 TIX: 0.02 EDHREC RANK: 1763 Blue spells you cast cost less to cast
Ali from Cairo has awful stats to balance its useful effect
Inti, Seneschal of the Sun Inti, Seneschal of the Sun combines an efficient 2-drop with discard, impulsive draw, and +1/+1 counters
That can depend on which of the trading card game's ink types you favour: do you like the fun combo potential of amethyst