Headwater Sentries

One With the Wind

Enchant creature
Enchanted creature gets +2/+2 and has flying.

Atzocan Archer

Reach
When Atzocan Archer enters, you may have it fight another target creature. (Each deals damage equal to its power to the other.)

Slash of Talons

Slash of Talons deals 2 damage to target attacking or blocking creature.

Island

Cancel

Glacial Fortress

Glacial Fortress enters tapped unless you control a Plains or an Island.
{T}: Add {W} or {U}.

Ixalli's Diviner

When Ixalli's Diviner enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Ashes of the Abhorrent

Players can't cast spells from graveyards or activate abilities of cards in graveyards.
Whenever a creature dies, you gain 1 life.

Forest

Deeproot Champion

Whenever you cast a noncreature spell, put a +1/+1 counter on Deeproot Champion.

Dive Down

Target creature you control gets +0/+3 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Sheltering Light

Target creature gains indestructible until end of turn. Scry 1. (Damage and effects that say "destroy" don't destroy the creature.)

Entrancing Melody

Gain control of target creature with mana value X.

Belligerent Brontodon

Each creature you control assigns combat damage equal to its toughness rather than its power.

Hinterland Harbor

Hinterland Harbor enters tapped unless you control a Forest or an Island.
{T}: Add {G} or {U}.

Pious Interdiction

Enchant creature
When Pious Interdiction enters, you gain 2 life.
Enchanted creature can't attack or block.

Prairie Stream

({T}: Add {W} or {U}.)
Prairie Stream enters tapped unless you control two or more basic lands.

Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Draw a card.

Sunpetal Grove

Sunpetal Grove enters tapped unless you control a Forest or a Plains.
{T}: Add {G} or {W}.