Plummet

Welcome to Sweettooth

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Create a 1/1 white Human creature token.
II — Create a Food token.
III — Put X +1/+1 counters on target creature you control, where X is one plus the number of Foods you control.

Audience with Trostani

Create a 0/1 green Plant creature token, then draw cards equal to the number of differently named creature tokens you control.

Three Blind Mice

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I — Create a 1/1 white Mouse creature token.
II, III — Create a token that's a copy of target token you control.
IV — Creatures you control get +1/+1 and gain vigilance until end of turn.

Slash of Talons

Slash of Talons deals 2 damage to target attacking or blocking creature.

Forest

Solemn Offering

Destroy target artifact or enchantment. You gain 4 life.

Halsin, Emerald Archdruid

{1}: Until end of turn, target token you control becomes a green Bear creature with base power and toughness 4/4 in addition to its other colors and types.
Choose a Background (You can have a Background as a second commander.)

Martyr of Dusk

When Martyr of Dusk dies, create a 1/1 white Vampire creature token with lifelink.

Plains

Inspiring Leader

Commander creatures you own have "Creature tokens you control get +2/+2."

Raise the Alarm

Create two 1/1 white Soldier creature tokens.

Watchful Giant

When Watchful Giant enters the battlefield, create a 1/1 white Human creature token.

Ordeal of Heliod

Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Heliod.
When you sacrifice Ordeal of Heliod, you gain 10 life.