When Coiling Oracle enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.
Return target instant or sorcery card from your graveyard to your hand.Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
DeathtouchWhen Skullwinder enters, return target card from your graveyard to your hand, then choose an opponent. That player returns a card from their graveyard to their hand.
Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)
Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)Whenever Broodbirth Viper deals combat damage to a player, you may draw a card.
When Oreskos Explorer enters, search your library for up to X Plains cards, where X is the number of players who control more lands than you. Reveal those cards, put them into your hand, then shuffle.
FlashWhen Plaxmanta enters, creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)When Plaxmanta enters, sacrifice it unless was spent to cast it.
Kicker (You may pay an additional as you cast this spell.)When Desolation Giant enters, destroy all other creatures you control. If it was kicked, destroy all other creatures instead.
Multikicker (You may pay an additional any number of times as you cast this spell.)Creatures you control get +1/+1.When Marshal's Anthem enters, return up to X target creature cards from your graveyard to the battlefield, where X is the number of times Marshal's Anthem was kicked.
Constellation — Whenever Dreadbringer Lampads or another enchantment you control enters, target creature gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Enchant permanentWhen Faith's Fetters enters, you gain 4 life.Enchanted permanent can't attack or block, and its activated abilities can't be activated unless they're mana abilities.