You may activate loyalty abilities of Teferi on any player's turn any time you could cast an instant.
+1: Draw a card, then discard a card.
−3: Target creature you don't control phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)
−10: Take two extra turns after this one.

You may pay rather than pay the mana cost for spells you cast.

Flying, vigilance
: When target creature other than this creature dies this turn, return that card to the battlefield under your control.

: Add .
: Add or . This artifact deals 1 damage to you.

Attacking creatures you control have deathtouch.
Whenever a creature you control deals combat damage to a player, draw a card.

Trample, haste
Skilled Outrider — Whenever this creature deals combat damage to a player, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. (For example, you may change "nonred creature" to "nongreen creature" or "plainswalk" to "swampwalk.")

The "legend rule" doesn't apply to permanents you control.
Each legendary creature you control gets +1/+1.
Each nontoken creature you control gets +1/+1 for each other creature you control with the same name as that creature.

Counter target instant or sorcery spell unless its controller has Molten Influence deal 4 damage to them.

If a creature dying causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
, Exile three creature cards from your graveyard: Put an indestructible counter on Drivnod. ( can be paid with either or 2 life.)

Flying
Whenever a player sacrifices another permanent, put a +1/+1 counter on each creature you control.

+1: Untap two target lands.
−1: Create a 3/3 green Beast creature token.
−4: Creatures you control get +3/+3 and gain trample until end of turn.

: Add X mana of any one color, where X is the number of Allies you control.

+1: Until your next turn, whenever a creature deals combat damage to Vraska, destroy that creature.
−3: Destroy target nonland permanent.
−7: Create three 1/1 black Assassin creature tokens with "Whenever this token deals combat damage to a player, that player loses the game."

: This creature deals 1 damage to any target.

: Add .

, , Untap a tapped creature you control: Create a 1/1 green and white Citizen creature token.
, , Untap two tapped creatures you control: Draw a card.
, , Untap fifteen tapped creatures you control: You win the game.

This land enters with a shield counter on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)
: Add .
: Move a shield counter from this land onto target creature. Activate only if two or more creatures entered the battlefield under your control this turn.

Dark Depths enters with ten ice counters on it.
: Remove an ice counter from Dark Depths.
When Dark Depths has no ice counters on it, sacrifice it. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.