Companion — Your starting deck contains only cards with mana value 3 or greater and land cards. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)
When Keruga enters, draw a card for each other permanent you control with mana value 3 or greater.
Keruga is a Simic midrange value engine that floods the board with expensive permanents, then cashes them in for a massive card draw burst when Keruga enters or re-enters. You ramp into a sequence of three-plus mana permanents, blink or recast Keruga to refill your hand, and grind opponents out with superior card advantage before closing with big threats. Built around the companion restriction (no cards under MV3 except lands), the deck plays as a high-curve goodstuff control-value pile.
Enormous card advantage from Keruga's enter trigger, refillable via blink and recursion
Companion gives you an extra card in every game without taking a deck slot
Simic ramp lets you deploy expensive permanents ahead of curve
Resilient grind plan that outvalues attrition-based opponents
Legendary Creature — Dinosaur Hippo
as a sorcery.)