Unalox, the Plague

Legendary Creature - Dragon

When Unalox, the Plague enters the battlefield, destroy two target lands.

Sacrifice a permanent: Unalox, the Plague gains flying, hexproof, and indestructible until end of turn. Draw a card. Activate this ability no more than twice each turn.

8/5

Seem sufficiently busted and mean. Shall we make the knights that are hunting this monster?

Ideally 5 mono colored knights, one for each color.

Devouring Hydra

Creature - Hydra

As an additional cost to cast this spell, exile a creature card from your graveyard.

Haste

Whenever Devouring Hydra attacks, exile three cards from among graveyards. If you can't put a +1/+1 counter on Devouring Hydra.

4/3

Wild.

Convergent Realities

Sorcery

Each player may put a permanent card from their hand onto the battlefield. Then for each permanent put onto the battlefield this way, if it did not have the highest mana value among permanents put onto the battlefield this way, or tied for the highest, return it to its owner's hand.

Not a specific dream, but dream-like, and dreams are weird.

Repeat.

Strands of Light

Sorcery

You gain 4 life. Draw a card.

You may cast a spell with mana value 4 or less from your hand without paying its mana cost.

Make a creature.