Defender, trample
At the beginning of combat on your turn, if you have at least 3 life more than than your starting life total, Thawing Yeti loses defender until end of turn. Otherwise, you gain 2 life.

Haste
When Summoning Swords enters the battlefield, search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.
Spellcharge 7

Target creature gets +3/+3 until end of turn. If the total number of land cards you own in exile, in your graveyard, and on the battlefield is at least seven, it gets +5/+5 instead, then untap it.

Create a 1/1 green Saproling creature token for each permanent card you own in your graveyard and in exile.
Flashback {2}{G}{G}

When Slumbering Grove enters the battlefield, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Spellcharge 8

When Seer of the Aspirants enters the battlefield, surveil 1.
Wander {2}{G}

Double target creature's power and toughness until end of turn.
Flashback {1}{G}

When Rotroot Hauler enters the battlefield, mill three cards, then you may put a permanent card in your graveyard on top of your library.

Reach
When Roaming Treefolk enters the battlefield, target creature or Ruin gets +2/+2 until end of turn.
Wander {5}{G}

Put two +1/+1 counters on target creature you control. It fights up to one target creature an opponent controls. You gain 4 life.

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Exile target card from a graveyard.

Mill a card. Put a +1/+1 counter on up to one target creature. Exile up to one target card from a graveyard. You gain 1 life.
Flashback {1}{G}

When Reaching Remnant enters the battlefield, it deals 4 damage to target creature with flying you don't control.
Spellcharge 3

Target creature you control gets +1/+1 until end of turn. Prevent all combat damage that other creatures would deal this turn.

Trample, ward {3}
Other Yetis you control get +1/+1.
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, create a 3/3 green Yeti creature token with trample.

Flash
When Permafrost Tiger enters the battlefield, you may have it fight target creature that entered the battlefield this turn.

Whenever one or more cards leave your graveyard, you gain 2 life. This ability triggers only once each turn.

Ward {1}
Whenever Morbid Bloomer deals combat damage, you may pay {1}. When you do, return up to one other target permanent card from your graveyard to your hand.

Monument to Might's power and toughness are each equal to the number of lands you control.
You may look at the top card of your library any time, and you may play lands from the top of your library.
Spellcharge 5

When Mokar Cliffbreaker enters the battlefield, you may exile a land card from your graveyard. If you do, you gain 4 life.
Wander {5}{G}{G}

Until end of turn, target creature gets +2/+2 and gains trample and “Whenever this creature deals combat damage to a player, return target permanent card with mana value less than or equal to the damage dealt from your graveyard to your hand.”

{T}: Add one mana of any color. If you have at least 3 life more than your starting life total, add two mana in any combination of colors instead.

Haste
Whenever Jens Slopeskidder or a land enters the battlefield under your control, put a +1/+1 counter on target creature you control.
Wander—{1}{G}, Return a land you control to its owner's hand.

At the beginning of combat on your turn, if you have at least 3 life more than your starting life total, untap target land.

As an additional cost to cast creature spells, you may pay {X}, where X is Heartbonder's power. When you do, put a +1/+1 counter on Heartbonder.