Blue spells you cast cost less to cast.

Myojin of Cleansing Fire enters with a divinity counter on it if you cast it from your hand.
Myojin of Cleansing Fire has indestructible as long as it has a divinity counter on it.
Remove a divinity counter from Myojin of Cleansing Fire: Destroy all other creatures.

: Another target creature you control gains protection from colorless or from the color of your choice until end of turn.

Create X 1/1 green Forest Dryad land creature tokens. (They're affected by summoning sickness.)

Flying, trample
Whenever an opponent searches their library, that player sacrifices a creature of their choice and loses 10 life.
Whenever another creature dies, put a +1/+1 counter on Ob Nixilis.

: Add .
, : Prevent the next 2 damage that would be dealt to target legendary creature this turn.

, : Copy target activated or triggered ability you control X times. You may choose new targets for the copies. This ability can't be copied and X can't be 0. (Mana abilities can't be targeted.)

Rielle gets +1/+0 for each instant and sorcery card in your graveyard.
Whenever you discard one or more cards for the first time each turn, draw that many cards.

(: Add .)

Changeling
Whenever you cast an instant or sorcery spell, if it targets one or more other permanents you control, create a token that's a copy of one of those permanents.
When a spell or ability an opponent controls causes you to discard this card, create a token that's a copy of target permanent.

( can be paid with either or 2 life.)
, , Sacrifice a creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.

Flying, vigilance
Players can't untap more than one creature during their untap steps.

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

Flying
Each other Rogue creature you control enters with an additional +1/+1 counter on it.
Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, that player discards a card.

Whenever you cast a noncreature spell, put a loyalty counter on Ral.
+1: Create a 1/1 blue and red Otter creature token with prowess.
−3: Draw three cards, then discard two cards.
−10: Draw three cards. You get an emblem with "Instant and sorcery spells you cast have storm." (Whenever you cast an instant or sorcery spell, copy it for each spell cast before it this turn.)

: Change a target of target spell or ability to this creature. ( can be paid with either or 2 life.)

, , Sacrifice this artifact: Search your library for a land card, reveal it, put it into your hand, then shuffle.

(: Add , , or .)
This land enters tapped.
Cycling (, Discard this card: Draw a card.)

: Add .
: Add . Activate only if you control an Island or a Swamp.

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.