Saheeli, the Gifted

+1: Create a 1/1 colorless Servo artifact creature token.
+1: The next spell you cast this turn costs less to cast for each artifact you control as you cast it.
−7: For each artifact you control, create a token that’s a copy of it. Those tokens gain haste. Exile those tokens at the beginning of the next end step.
Saheeli, the Gifted can be your commander.

Dwindle

Enchant creature
Enchanted creature gets -6/-0.
When enchanted creature blocks, destroy it. (The attacking creature remains blocked.)

Gift of Paradise

Enchant land
When Gift of Paradise enters the battlefield, you gain 3 life.
Enchanted land has “: Add two mana of any one color.”

Sparring Mummy

When Sparring Mummy enters the battlefield, untap target creature.

Fathom Mage

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Whenever a +1/+1 counter is put on Fathom Mage, you may draw a card.

Arena Rector

When Arena Rector dies, you may exile it. If you do, search your library for a planeswalker card, put it onto the battlefield, then shuffle your library.

Claustrophobia

Enchant creature
When Claustrophobia enters the battlefield, tap enchanted creature.
Enchanted creature doesn’t untap during its controller’s untap step.

Treasure Mage

When Treasure Mage enters the battlefield, you may search your library for an artifact card with converted mana cost 6 or greater, reveal it, put it into your hand, then shuffle your library.

Azor, the Lawbringer

Flying
When Azor, the Lawbringer enters the battlefield, each opponent can’t cast instant or sorcery spells during that player’s next turn.
Whenever Azor attacks, you may pay . If you do, you gain X life and draw X cards.

Sailor of Means

When Sailor of Means enters the battlefield, create a Treasure token. (It’s an artifact with “, Sacrifice this artifact: Add one mana of any color.”)

Azor, the Lawbringer

Flying
When Azor, the Lawbringer enters the battlefield, each opponent can’t cast instant or sorcery spells during that player’s next turn.
Whenever Azor attacks, you may pay . If you do, you gain X life and draw X cards.

Claustrophobia

Enchant creature
When Claustrophobia enters the battlefield, tap enchanted creature.
Enchanted creature doesn’t untap during its controller’s untap step.

Claustrophobia

Enchant creature
When Claustrophobia enters the battlefield, tap enchanted creature.
Enchanted creature doesn’t untap during its controller’s untap step.

Master of the Pearl Trident

Other Merfolk creatures you control get +1/+1 and have islandwalk. (They can’t be blocked as long as defending player controls an Island.)

Sailor of Means

When Sailor of Means enters the battlefield, create a Treasure token. (It’s an artifact with “, Sacrifice this artifact: Add one mana of any color.”)

Ripjaw Raptor

Enrage — Whenever Ripjaw Raptor is dealt damage, draw a card.

Ripjaw Raptor

Enrage — Whenever Ripjaw Raptor is dealt damage, draw a card.

Ripjaw Raptor

Enrage — Whenever Ripjaw Raptor is dealt damage, draw a card.

Kindred Summons

Choose a creature type. Reveal cards from the top of your library until you reveal X creature cards of the chosen type, where X is the number of creatures you control of that type. Put those cards onto the battlefield, then shuffle the rest of the revealed cards into your library.