When Stalking Leonin enters the battlefield, secretly choose an opponent. Reveal the player you chose: Exile target creature that's attacking you if it's controlled by the chosen player. Activate only once.
Delirium — {1}{B}: Stallion of Ashmouth gets +1/+1 until end of turn. Activate only if there are four or more card types among cards in your graveyard.
Echoing hoofbeats can no longer be assumed to be help from the Gavony Riders.
Vigilance Coven — At the beginning of combat on your turn, if you control three or more creatures with different powers, creatures you control gain indestructible until end of turn.
When Stalwarts of Osgiliath enters the battlefield, the Ring tempts you. Whenever you draw your second card each turn, put a +1/+1 counter on Stalwarts of Osgiliath.
"The Enemy must pay dearly for the crossing of the River." —Denethor
When Stangg enters the battlefield, create Stangg Twin, a legendary 3/4 red and green Human Warrior creature token. Exile that token when Stangg leaves the battlefield. Sacrifice Stangg when that token leaves the battlefield.
Enchantment spells you cast cost {1} less to cast. Whenever an enchantment you control is put into a graveyard from the battlefield, put a +1/+1 counter on Starfield Mystic.
At the beginning of your upkeep, you may return target enchantment card from your graveyard to the battlefield. As long as you control five or more enchantments, each other non-Aura enchantment you control is a creature in addition to its other types and has base power and base toughness each equal to its mana value.