Rampaging Hippo

Creature — Hippo (5/6)

Trample
Cycling (, Discard this card: Draw a card.)

Ravenous Lindwurm

Creature — Wurm (6/6)

When Ravenous Lindwurm enters the battlefield, you gain 4 life.

Regal Behemoth

Creature — Dinosaur (5/5)

Trample
When Regal Behemoth enters the battlefield, you become the monarch.
Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color.

Regal Force

Creature — Elemental (5/5)

When Regal Force enters the battlefield, draw a card for each green creature you control.

Roaring Slagwurm

Creature — Wurm (6/4)

Whenever Roaring Slagwurm attacks, tap all artifacts.

Root Elemental

Creature — Elemental (6/5)

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Root Elemental is turned face up, you may put a creature card from your hand onto the battlefield.

Root-Kin Ally

Creature — Elemental Warrior (3/3)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Tap two untapped creatures you control: Root-Kin Ally gets +2/+2 until end of turn.

Roughshod Mentor

Creature — Giant Warrior (5/4)

Green creatures you control have trample.

Sandsteppe Mastodon

Creature — Elephant (5/5)

Reach
When Sandsteppe Mastodon enters the battlefield, bolster 5. (Choose a creature with the least toughness among creatures you control and put five +1/+1 counters on it.)

Scaled Behemoth

Creature — Crocodile (6/7)

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Scaled Hulk

Creature — Spirit (4/4)

Whenever you cast a Spirit or Arcane spell, Scaled Hulk gets +2/+2 until end of turn.

Scaled Wurm

Creature — Wurm (7/6)

Segmented Krotiq

Creature — Insect (6/5)

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Shambling Strider

Creature — Yeti (5/5)

: Shambling Strider gets +1/-1 until end of turn.

Shefet Monitor

Creature — Lizard (6/5)

Cycling (, Discard this card: Draw a card.)
When you cycle Shefet Monitor, you may search your library for a basic land card or a Desert card, put it onto the battlefield, then shuffle. (Do this before you draw.)

Siege Wurm

Creature — Wurm (5/5)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Trample

Sifter Wurm

Creature — Wurm (7/7)

Trample
When Sifter Wurm enters the battlefield, scry 3, then reveal the top card of your library. You gain life equal to that card's mana value.

Silvos, Rogue Elemental

Legendary Creature — Elemental (8/5)

Trample
: Regenerate Silvos, Rogue Elemental.

Skarrg Goliath

Creature — Beast (9/9)

Trample
Bloodrush — , Discard Skarrg Goliath: Target attacking creature gets +9/+9 and gains trample until end of turn.

Skyscythe Engulfer

Creature — Phyrexian Beast (6/5)

Reach, trample
Skyscythe Engulfer can't be blocked by creatures with flying.