This is a great card draw tool, as mentioned below, I don’t think I have to convince anyone about it. But about the deck-thinning aspect, different from what others said, 3x Daeron's Runes make your deck size effectively 44, not 47. If you imagine you only have 2 cards left in the deck, after you play it you have 0 cards, so two cards less than the nominal number (it doesn't matter that you have to discard one, it's as if it never existed in your deck). In terms of card draw, you end up having the same hand size, but you see two new cards; often you have duplicates or cards you are not particularly interested in (or which you give less value to what you could potentially draw), so in many cases you thin your deck by one card (replacing Daeron's Runes) and get a new, potentially interesting card (thinning your deck by one more). A 0-cost card that does card draw and deck thinning this way must be one of the most powerful cards of this type.

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Now with the new ALeP Eagles added to the card pool, this card has just gotten better. I run this in an all-eagle deck (with Radagast), and with a total of 30 cards having the Eagle trait (excluding the three copies of The Eagles Are Coming!), this is guaranteed to pseudo-draw at least 3 cards per use (unless you’re really, really unlucky). And with its ability to chain into another copy, I’ve managed to “draw” a total of 10 cards with this in one round. Certainly one of the very few reasons to own the Hunt for Gollum adventure pack (because the Quest sure isn’t), and it has aged like fine wine.

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I'm really disappointed by the wording of Radagast's text box :

You may use resources from Radagast's pool to pay for Creature allies of any sphere.

This ability doesn't allow you to pay 0-cost cards as you don't have a resource match. Notably, if you use your Staff to reduce the cost of a Creature by 2, you will not be able to play it if you don't have another hero with the correct resource icon.

This is half of the available creatures cards in the pool, and the ones you want to play the most : Messenger Raven, Vassal of the Windlord, Winged Guardian, Eagle Emissary, The Riddermark's Finest, Wild Stallion, Bill the Pony. (the ratio gets even worse with AleP cards).

Most of the time Radagast is played in an Eagle deck alongside heroes, so you won't notice it, but it harms seriously other build like a Grey Wanderer deck.

A good fix would be to recognize that, as every other Istari, Radagast should gain a printed icon :

When you play a Creature card, Radagast gains the printed , , and icons.

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I've always thought the 0-cost ruling was especially unintuitive. You could just read it the way you want it to work and I don't think anyone would blame you! —
Just don't use his Staff on those creatures then. They're already cheap to begin with, and with Radagast they are practically free. He shines at lowering the cost of the more expensive creatures. Giving him printed resource icons would make him OP. —
Note that Caleb confirmed in a CotR episode that hero Radagast was indeed meant to work that way (that is to say being able to play Creature allies of all spheres even when their cost are reduced to 0). I think they might have used hero Elrond's templating without realizing it was a non-bo with the Staff —
ALeP also proposed a fix similar to the one you are proposing: https://alongextendedparty.com/alep-faq-and-errata/ —
And finally we will have your proposed fix being made official with the reprint —

Say you stick a restricted attachment on her lore side, does it disappear when she flips into tactics mode? Or do you get it back when she turns back into her lore version?

I'm wondering as I wanted to put a burning brand on her to defend against the lesser attacks but when I want to flip her I dont want to have to find a burning brand again...

Love this characters passive ability in lore mode. She really sets up a beorning deck.

Any restricted attachments you played on her Lore side are discarded when she flips to her Tactics side. Here you can find a few FAQ about her in case you are interested https://alongextendedparty.com/alep-faq-and-errata/ —
Thanks very much! That clears that up. —

I like using this card to boost willpower in Lore and its stats compare to many 4 cost allies (Ranger of Cardolan, Haldir of Lórien, Thalion). Cheap and quick to get into play and I have found the threat increase to be pretty manageable. It's nice having a 2 Lore ally for 2 resources and I have used the 2 attack plenty of times as well.

There are five other 2 , 2 cost Lore allies (Quickbeam, Mablung, Robin Smallburrow, Wandering Ent, and Lindon Navigator). Quickbeam, Mablung, and Robin Smallburrow make a good 3-card combination if you are looking to boost willpower without paying a threat increase. Wandering Ent (enters play exhausted) and Lindon Navigator (requires discarding cards) have their own additional costs to use.

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