Insight

Whenever an opponent casts a green spell, you draw a card.

Warmth

Whenever an opponent casts a red spell, you gain 2 life.

Chancellor of the Annex

You may reveal this card from your opening hand. If you do, when each opponent casts their first spell of the game, counter that spell unless that player pays {1}.
Flying
Whenever an opponent casts a spell, counter it unless that player pays {1}.

Havoc

Whenever an opponent casts a white spell, they lose 2 life.

Sanctimony

Whenever an opponent taps a Mountain for mana, you may gain 1 life.

Jegantha, the Wellspring

Companion — No card in your starting deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)
{T}: Add {W}{U}{B}{R}{G}. This mana can't be spent to pay generic mana costs.