
Instant
( can be paid with either
or 2 life.)
Counter target spell with mana value 1.

Cheap U counter targeting noncreature spells, similar low-cost interaction.

One-mana counter for instants/sorceries/enchantments, efficient protection.

One-mana instant counter great against low-cost spells and storm.

One-mana counter for instants, cheap targeted interaction.

One-mana flexible counter/removal, similar tempo role.

Free counter for noncreature spells, protects combos like Misstep.

Can be free, counters multiple low-cost spells, hate piece.

One-mana counter for noncreature spells, efficient interaction.
A card with Phyrexian mana symbols in its mana cost is each color that appears in that mana cost, regardless of how that cost may have been paid.
If you're at 1 life or less, you can't pay 2 life.
If a spell has in its mana cost, X is considered to be the value chosen for it while that spell is on the stack.
Each Phyrexian mana symbol in a spell's mana cost contributes 1 to that spell's mana value. For example, Mental Misstep's mana value is 1, regardless of how its cost was paid.