So since no new map event has been added since the launch of the game I would like to propose an idea just for fun. So my idea is relatively simple. The event would allow a player to pick a unique card that can only be obtained by this event. The possible cards you could get would be an item belonging to a boss you've previously bested. For example the snowknights lance. You would either get a random one or get the option to choose between all items from the bosses you've slayen during your run. I think it would be fun if the items had simular effects to the boss it belonged too. Again with the snowknights example the lance would gain +1 damage when ever anything is snowed while it's in your hand. To balance these items I would suggest they can not be equiped with charms and that this event can only go to this event once in a game (stops appearing on the map once you've gone to it once).
#New map event idea: Weapon/item drops from bosses
fair magnet
So here are my suggestions for cards you can get:
-Snowknight:
Snowknights lance would gain +1 dmg 
for each time snow is applied to anyone starting with 1 damage.
-Big peng:
Big peng's mask would work like a summon and spawn pengoons/chungoons/waddlegoons on all avaible spots on your side.
-Bogberry:
Mega sized berry giving +2 dmg and +2 hp 
to all allies
-Nimbus:
Nimbus's cloud apply 1 
to all enemies
-Bumbo:
Bumbo's bazooka 2 dmg , apply 2 barrage
-king moko:
Moko's necklace apply 15 
to an ally consume
-Bolgo:
Bolgo shell would hit all allies for 0 damage and apply 4 shell
-Lumako:
Lumako crystal buff a card or allies effect by 1
-Maw jaw:
Maw jaw's tail spawn a 5 10 ally based on maw jaw's tail that triggers when hit
-muttonhead:
A spike with bell like on muttonheads back: 16 dmg can only hit targets, on kill apply 1 
to all enemies
-numskull:
Numskull shell applies 3 block consume
-queen globerry:
Globerry staff deal dmg equal to of highest hp ally
-razor:
Razor tooth 3 dmg aimless, gain equal 
to number of allies on your side
-ringer:
Ringer's cloak while held in hand apply 3 
to a random enemy when an enemy attacks
-Weevil:
Weevil tooth destroy an item in hand deal 20 dmg
-Veiled lady:
Royal spores apply 5 
on 1 enemy
dapper dust
big peng mask is horribly OP
same is true for bogberry's drop
bumbo's thing also though i guess not that bad
dapper dust
bolgo's thing is also OP as hell
Lumako's thing is OP as hell
Maw Jaw's tail is OP (no consume 10 health lol)
dreamy merlin
*item
*no consume
*create +1/2 knuckles
Uh anyways I do like the idea of new item nodes and this does sound cool these ideas are just obscenely op
fair magnet
They probably are op but it's just a suggestion of what could be. Final balance would be up to the dev's of course 
noble monolith
Assuming thee are all Consume these sound really cool.
violet gale
"No new map event has been added since the launch of the game" Injured companion event is sad