As long as there are four or more lore counters among Sagas you control, Tom Bombadil has hexproof and indestructible.
Whenever the final chapter ability of a Saga you control resolves, reveal cards from the top of your library until you reveal a Saga card. Put that card onto the battlefield and the rest on the bottom of your library in a random order. This ability triggers only once each turn.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Flying
When this creature enters, create a Map token. (It's an artifact with ", , Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")

You may cast this card from your graveyard or from exile.

Other Mice you control get +1/+1.
When Mabel enters, create Cragflame, a legendary colorless Equipment artifact token with "Equipped creature gets +1/+1 and has vigilance, trample, and haste" and equip .

Trample (This spell can deal excess damage to its target's controller.)
Super-Duper Death Ray deals 4 damage to target creature.

If this card is in your opening hand, you may begin the game with it on the battlefield.
Whenever you tap a creature for mana, add an additional .
: Put a +1/+1 counter on each creature you control.

Temporal Foresight — When this creature enters, reveal cards from the top of your library until you reveal a nonland card with mana value 3 or greater. Exile that card with three time counters on it. If it doesn't have suspend, it gains suspend. Put the rest of the revealed cards on the bottom of your library in a random order.

, : Search your library for a card, put that card into your hand, then shuffle.

Destroy target creature. It can't be regenerated. Its controller creates a 3/3 green Ape creature token.

Whenever you activate an ability of a creature, draw a card. This ability triggers only once each turn.
: Exile up to two other target nonland permanents you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

Flying, haste
At the beginning of combat on your turn, if you've cast three or more instant and sorcery spells this turn, return this card from your graveyard to the battlefield.

When this artifact enters, you may sacrifice a nontoken creature. If you do, draw X cards, then mill X cards, where X is that creature's power.
Craft with one or more creatures
: Return this card from your graveyard to your hand.

Counter target spell.

Whenever you cast your first spell during each opponent's turn, draw a card.

This artifact enters tapped.
, : Destroy all artifacts, creatures, and enchantments.

Flying
When Bladewing enters, you may return target Dragon permanent card from your graveyard to the battlefield.
: Dragon creatures get +1/+1 until end of turn.

Flying, hexproof
Spells and abilities your opponents control can't cause you to sacrifice permanents.

Equipped creature gets +2/+2.
As long as equipped creature is legendary, it has hexproof. (It can't be the target of spells or abilities your opponents control.)
Equip

: Add one mana of any color in your commander's color identity.