Steel Leaf Champion

Steel Leaf Champion can’t be blocked by creatures with power 2 or less.

Two-Headed Giant

Whenever Two-Headed Giant attacks, flip two coins. If both coins come up heads, Two-Headed Giant gains double strike until end of turn. If both coins come up tails, Two-Headed Giant gains menace until end of turn.

Frenzied Rage

Enchant creature
Enchanted creature gets +2/+1 and has menace. (It can’t be blocked except by two or more creatures.)

Silverclad Ferocidons

Enrage — Whenever Silverclad Ferocidons is dealt damage, each opponent sacrifices a permanent of their choice.

Naturalize

Destroy target artifact or enchantment.

Silverclad Ferocidons

Enrage — Whenever Silverclad Ferocidons is dealt damage, each opponent sacrifices a permanent of their choice.

Seafloor Oracle

Whenever a Merfolk you control deals combat damage to a player, draw a card.

Silverclad Ferocidons

Enrage — Whenever Silverclad Ferocidons is dealt damage, each opponent sacrifices a permanent of their choice.

Seafloor Oracle

Whenever a Merfolk you control deals combat damage to a player, draw a card.

Seafloor Oracle

Whenever a Merfolk you control deals combat damage to a player, draw a card.

Mary O’Kill

: Switch a Killbot or Mary O’Kill in your hand with one on the battlefield. (If a creature is tapped, the switched creature is tapped. The same is true for untapped, attacking, blocking, enchanted, equipped, and targeted. Any counters on a creature are on the switched creature instead.)

Dr. Julius Jumblemorph

Dr. Julius Jumblemorph is every creature type (even if this card isn’t on the battlefield).
Whenever a host you control enters, you may search your library and/or graveyard for a card with augment and combine it with that host. If you search your library this way, shuffle.

Old-Fashioned Vampire

Flying
Old-Fashioned Vampire gets +2/+2 and has deathtouch as long as it’s dark outdoors.

Watermarket

: Add . Spend this mana only to cast spells with watermarks.

Split Screen

When Split Screen enters, shuffle your library and deal it into four libraries. If anything refers to your library, choose one of your libraries for it.
Play with your libraries’ top cards revealed.
When Split Screen leaves the battlefield, shuffle your libraries together.

Secret Base

: Add .
: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base.

Rigging Runner

First strike
Raid — Rigging Runner enters with a +1/+1 counter on it if you attacked this turn.

Ranging Raptors

Enrage — Whenever Ranging Raptors is dealt damage, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Taigam, Ojutai Master

Instant, sorcery, and Dragon spells you control can’t be countered.
Whenever you cast an instant or sorcery spell from your hand, if Taigam, Ojutai Master attacked this turn, that spell gains rebound. (Exile the spell as it resolves. At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.)