Changeling
: Target creature gains all creature types until end of turn.
: Target creature loses all creature types until end of turn.

, Discard a card at random: Put a +1/+1 counter on target creature.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Target creature you control fights up to one target creature an opponent controls.
You gain 3 life.
Return target creature card from your graveyard to your hand.

Start your engines!
: Add .
Max speed — : Target creature gains haste until end of turn.

, : You may put a creature card from your hand onto the battlefield. Activate only as a sorcery.

Ninjutsu
Whenever Moon-Circuit Hacker deals combat damage to a player, scry 2, then draw a card. Discard a card unless Moon-Circuit Hacker entered the battlefield this turn.

Equipped creature gets +3/+0 and is every creature type.
Equip

Kicker
If Moss-Pit Skeleton was kicked, it enters with three +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on a creature you control, return Moss-Pit Skeleton from your graveyard to your hand at the beginning of the next end step.

Flash
Enchant creature
Enchanted creature gets +2/+2.
When enchanted creature dies, create two Treasure tokens.

First strike
When this creature enters, you get (two energy counters). Then if you cast it from your hand, exile cards from the top of your library until you exile a nonland card. You may cast that card by paying an amount of equal to its mana value rather than paying its mana cost.

This spell costs less to cast for each electrical socket in a wall or floor you can see from your seat.
Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gets +3/+0 and gains haste.

Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Flash
Storm
Enchant creature
Enchanted creature loses all abilities and is a blue Frog creature with base power and toughness 1/1.

Whenever this creature blocks or becomes blocked by one or more blue and/or black creatures, this creature gets +3/+3 until end of turn.

When this creature enters, exile up to one target non-Salamander creature. That creature's controller creates a 4/3 blue Salamander Warrior creature token.
Encore

: Target creature can't be blocked this turn.

At the beginning of your upkeep, reveal cards from the top of your library until you reveal a creature card. Until your next turn, this creature's base power becomes twice that card's power and its base toughness becomes twice that card's toughness. Put the revealed cards on the bottom of your library in a random order.

When this creature enters, creatures you control get +1/+1 until end of turn.

Whenever you attack, double target creature's power until end of turn.

This creature can't be blocked by creatures with power 3 or greater.

, : Search your library for a Rebel permanent card with mana value 3 or less, put it onto the battlefield, then shuffle.

This creature can't be blocked except by artifact creatures and/or white creatures.

Flying
, Discard a card: Return this creature to its owner's hand.

, : Prevent the next 1 damage that would be dealt to any target this turn.

Remove Amulet of Quoz from your deck before playing if you're not playing for ante.
, Sacrifice Amulet of Quoz: Target opponent may ante the top card of their library. If they don't, you flip a coin. If you win the flip, that player loses the game. If you lose the flip, you lose the game. Activate this ability only during your upkeep.

Whenever you become the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays .
Creature tokens get -1/-0.

, , Exile this artifact: Exile target artifact, creature, or land. Activate only as a sorcery.

Whenever a permanent you control enters tapped, untap it.

Partner with Rory Williams
Whenever Amy Pond deals combat damage to a player, choose a suspended card you own and remove that many time counters from it.
Doctor's companion (You can have two commanders if the other is the Doctor.)