Mana Tithe

Counter target spell unless its controller pays {1}.

Withering Boon

As an additional cost to cast this spell, pay 3 life.
Counter target creature spell.

Dash Hopes

When you cast this spell, any player may pay 5 life. If a player does, counter Dash Hopes.
Counter target spell.

Vigilant Martyr

Sacrifice this creature: Regenerate target creature.
{W}{W}, {T}, Sacrifice this creature: Counter target spell that targets an enchantment.

Deathgrip

Illumination

Counter target artifact or enchantment spell. Its controller gains life equal to its mana value.

Boromir, Warden of the Tower

Vigilance
Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.
Sacrifice Boromir: Creatures you control gain indestructible until end of turn. The Ring tempts you.

Savage Summoning

This spell can't be countered.
The next creature spell you cast this turn can be cast as though it had flash. That spell can't be countered. That creature enters with an additional +1/+1 counter on it.

Avoid Fate

Counter target instant or Aura spell that targets a permanent you control.

Bind

Counter target activated ability. (Mana abilities can't be targeted.)
Draw a card.

Order of the Sacred Torch

{T}, Pay 1 life: Counter target black spell.

Unyaro Griffin

Flying
Sacrifice this creature: Counter target red instant or sorcery spell.

Rust

Counter target activated ability from an artifact source. (Mana abilities can't be targeted.)