I have been playing Magic: The Gathering since 1994 and have won a few draft tournaments in MTGO and MTG Arena.
Counterspell is a blue instant that costs two blue mana.
It counters target spell.
Before the advent of uncounterable spells and after all interrupts became instants, countering a spell was absolute.
Still, a spell that can counter almost anything unconditionally for a mere two blue mana is powerful.
A lot of blue players love bluffing Counterspells too as they like leaving two blue mana open and its anybody's guess if they actually have a Counterspell in hand or are just bluffing.
Mana Leak is a blue instant that costs one colorless and one blue mana.
It counters target spell unless its controller pays three colorless mana.
While it may not be as powerful or as absolute as a Counterspell, Mana Leak's casting cost makes it easier to splash in multi-color decks.
The downside of Mana Leak is that in the middle or end part of the game, your opponent can easily pay the three colorless mana to negate the effect of Mana Leak.
Just like Counterspell, players also like bluffing Mana Leak. You really won't know if they really have a Mana Leak in hand or are just bluffing.
Boomerang is a blue instant that costs two blue mana.
It returns a permanent to its owner's hand.
Boomerang can be used to save your own permanents from a removal or mass destruction spell.
It can also be used to slow down your opponent as you can return a creature, planeswalker or even a land that he owns.
Imagine if you had a Boomerang on an Isochron Scepter on turn 2, you can keep bouncing your opponents lands and stop him from progressing.
Preordain is a blue sorcery that costs one blue mana.
It lets you Scry for 2 then draw a card.
This enables you to cycle through your deck quicker as well as remove any unneeded cards at the moment.
Part of winning is getting cards you need when you need them and Preordain helps you do that.
Spell Pierce is a blue instant that costs one blue mana.
It counters target noncreature unless its controller pays two colorless mana.
This is very useful early in the game to counter tutors, mana rocks, planeswalkers and land acceleration cards.
Just like Mana Leak though, this card is not really useful in the middle and end game as opponents can easily pay the two colorless mana to negate this spell.
Brainstorm is a blue instant that costs one blue mana.
It lets you draw three cards, pick one of them then place the rest on top of your library in any order.
Brainstorm lets you control your next two draws which is great and helps you get the cards you need at the right time.
Winged Sliver is a blue creature that costs one colorless and one blue mana.
It has one power and one toughness.
It grants all slivers including itself the ability to fly.
While flying is one of the oldest abilities in Magic, it is still a fairly good evasion mechanic.
This lets you attack with your army unimpeded unless they also have flying creatures or creatures with reach.
Slivers first appeared in the Tempest expansion and have been one of the more popular creature types.
Daze is a blue instant that costs one colorless and one blue mana.
It counters target spell unless its controller pays one colorless mana.
At first glance, this may look like an overcosted Force Spike.
However, you can return an Island you control to its owner's hand as an alternate cost.
This helps you surprise your opponent as they will have a false sense of security they won't be countered since you are already tapped out.
Persistent Petitioners is a blue creature that costs one colorless and one blue mana.
It has one power and three toughness.
You can have any number of Persistent Petitioners in your deck.
While a single petitioner mills a single card and is not exciting, having four of them in play mills twelve cards at once.
Since it is recommended that a deck be made with sixty cards, you can easily win in five to six turns simply milling your opponent.
Delver of Secrets / Insectile Aberration
Delver of Secrets is a blue creature that costs one blue mana.
It has one power and one toughness.
At the beginning of your upkeep, if the top card is an instant or sorcery, transform Delver of Secrets into Insectile Aberration.
Insectile Aberration has three power and two toughness.
It has flying.
© 2021 Jan Michael Ong