Ophidian Eye

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Now for Wrath, Now for Ruin!

Put a +1/+1 counter on each creature you control. They gain vigilance until end of turn. The Ring tempts you.

Slither Blade

Haunting Figment

Vigilance
Haunting Figment can't be blocked as long as you've cast an instant or sorcery spell this turn.

Island

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Counterspell

Plains

Holy Day

Prevent all combat damage that would be dealt this turn.

Triton Shorestalker

Nightwhorl Hermit

Vigilance
Threshold — As long as seven or more cards are in your graveyard, Nightwhorl Hermit gets +1/+0 and can't be blocked.

Angelsong

Prevent all combat damage that would be dealt this turn.
Cycling {2} ({2}, Discard this card: Draw a card.)

Bellowing Crier

When Bellowing Crier enters, draw a card, then discard a card.

Stonehorn Dignitary

When Stonehorn Dignitary enters, target opponent skips their next combat phase.