Regardless, merfolk of any MTG plane consistently support their creature type, be that as your classic Lord of Atlantis or cards like Silvergill Adept and Deeproot Elite that demand a shoal of merfolk to support them
Beseech the Mirror Bilbo's Deadly Slice Bile-Vial Boggart Billowing Shriekmass Binding Negotiation Bitter Triumph Bitterbloom Bearer Black Cat, Cunning Thief Black Mage's Rod Black Widow, Super Spy Blacksnag Buzzard Blade of the Swarm Blasphemous Edict Blight Rot Blighted Blackthorn Blood Hustler
Terra took the lead for the Final Fantasy VI deck (although Celes was a strong contender), and Tidus will command the Final Fantasy X deck
This does come at the cost of having to exile 3 cards in addition to the mana cost of the card
My weapons are these fists of mine! Illustrated by Kevin Sidharta Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
For example, if you control a Deep-Slumber Titan (a creature that says "Deep-Slumber Titan doesn't untap during your untap step") , you untap Deep-Slumber Titan during each opponent's untap step