The Watchlist
AKA the cards that might get nerfed pretty soon
Fiora
Fiora has an amazingly powerful effect, but requires quite a bit of work to jump through all the hoops. There are three aspects of Fiora we're watching: her overall win rate, her ability to punish strategies that play smaller units, and the frustration of attacking into her. Thus far, we think there are lots of benefits to having such a unique and fun build-around champion in Legends of Runeterra, and she hasn't yet reached a level where we think a nerf or redesign is needed.
Anivia
Copying, reviving, and giving Ephemeral to Anivia are all intended gameplay, but can sometimes be exceptionally frustrating to play against. We don't think numbers tweaks will fix these interactivity problems, so no changes for now. Instead, we're watchlisting the Cryophoenix with the intent to modify how she functions and find a better balance in the future.
Deny
Deny has a powerful, unique effect, and we think that its prevalence during the first preview patch was due to the outsized impact of big mana / late game / She Who Wanders decks and Deny's role in defending against them. Now that we've adjusted many of the tools that contributed toward the power of those strategies, we expect the reactive power of Deny to decrease in a similar way. We're still keeping watch on it, and if we see significant fractions of the meta playing Ionia specifically to gain access to this tool, we'll consider rebalance or redesign.