A "Landfall withTreasure" card

What colors do you have Treasure tokens in? If they're a white mechanic in this set it's a little odd but otherwise fine; otherwise, this card is a bit of a color pie break since white is the worst color for ramp. You could make an exception if it's a white trigger (such as gaining life, perhaps) but playing a land is also not especially white either. If I didn't see the symbol I would guess at it being green, though any other color could possibly make sense depending on the context of the set.

As for balance, it seems quite overpowered. Lotus Cobra is already an excellent card, and this is that but considerably better: with just fetchlands and a mana dork turn 1, you can look forward to 8 mana on turn 3. Personally I would cost this effect at 4 or 5 mana depending on the body (power and toughness?) and colors it's in.

Ooops... power and toughness are 0/1... forgotten... U_U"

In the set white has Landfall as primary mechanic and then a strong "artifact cares" feeling, not a particular Treasure based but it shares it with red. 
Because of the flavor of the set, white has shifted a bit (green already have Explore as primary and a tribal subtheme as secondary)
Actually I took Vinelasher Kudzu as inspiration, trying to shift to another color...

True, the card would help ramp (and white don't do it), but using the treasures will keep the Landlord at 0/1, so the player must decide if sac the treasures or collect them and grows in strenght. 
As seen in Ixalan, almost every color has access to treasures, that are more a color fix that ramp imho.... probably.... 
Do you think is too out of color pie?



Yep, a growing rich lord expanding his domain...
The first flavor text for Alford Landlord was "Each territory I control adds gold to my coffers and weapons to my collection."
I like the "tax idea", but it step away a bit from the original idea of growing domain... 
I would like to maintain if possible the choice of keeping the treasures to have a bonus or use them. 
Also it rewards players for something their opponents do, so it seems a bit situational (that's why Dire Fleet Daredevil is not as cool as Snappy imho).
But it's an original idea to look at and I could use it on a couple of other cards... 

What if we increase the cost to 3?

Alford Landlord  
Creature - Human Lord
Landfall - Whenever a land enters the batlefield under your control, create a colorless Treasure artifact token with ", Sacrifice this artifact: Add one mana of any color."
Alford Landlord gets +1/+1 for each Treasure you control.
0/1

In the end Oran Rief Hydra is a 5/5 trample at 6... 
Or better to stick at 4? WW2? 

Thanks to all for the feedback!

Yeah this is sort of what I thought of when I saw the card. Like in a vacuum you could see it as:

Whenever a land enters the battlefield under your control, put a +1/+1 counter on ~.
Remove a +1/+1 counter from ~: Add one mana of any color.

Clearly this would be an extremely green card, with only the addition of artifacts confusing its color identity. 

The issue here is that you can freely choose whether to use the treasures for ramp, making it both a ramp card and an efficiency grindy Vinelasher Kudzu type card. (You could see Captain Lannery Storm for a good example of this sort of combination of abilities in color.) In the scenario I posted above, you could happily attack with it as a 4/5 on turn 3, then spend your 8 mana (though I know it wouldn't be costed that cheap, just making a point). Treasures in Ixalan were generally used to conserve mana, in a way: spells were overcosted but gave you tokens you could store up and use at once. (Incidentally, they only appeared in the pirate colors, though they did also appear on colorless cards). This card, on the other hand, just generates a ton of free mana, which just isn't white no matter what you cost it as.

I'm guessing changing the card's color just isn't an option? If landfall is already white in your set then that can't really be changed, so perhaps you could try some other bonus other than treasures? You could make any "Sacrifice: [effect]" artifact token, though you wouldn't be able to use the name treasure.

Similar to what Tesagk mentioned, white historically only cares more about opponents having more lands than them, though that does make it hard to fit the flavour. I do though agree with generalising the bonus being based off all artifacts, not just treasures, though your +1/+1 wording is fine. (generic mana comes first tho)