Whenever another nontoken creature you control enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
You may have Estrid's Invocation enter as a copy of an enchantment you control, except it has "At the beginning of your upkeep, you may exile this enchantment. If you do, return it to the battlefield under its owner's control."
Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, you may cast that card without paying its mana cost if the two spells have the same mana value.
FlyingCreatures you control have "Whenever this creature becomes the target of a spell or ability, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand. This ability triggers only twice each turn."
Whenever another nontoken creature you control enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
HasteWhenever Laelia, the Blade Reforged attacks, exile the top card of your library. You may play that card this turn.Whenever one or more cards are put into exile from your library and/or your graveyard, put a +1/+1 counter on Laelia.
As an additional cost to cast this spell, sacrifice an artifact or creature.Draw two cards.Flashback (You may cast this card from your graveyard for its flashback cost and any additional costs. Then exile it.)
When Rosheen, Roaring Prophet enters, mill six cards. You may put a card with in its mana cost from among them into your hand.: Reveal any number of cards with in their mana cost in your hand. Add for each card revealed this way. Spend this mana only on costs that contain .