The Eternalist - I'm Canadian and That's Okay

Howdy folks! It's Joe again and we're back with another look into the history and gameplay of another Legacy archetype.
This time, we're delvering into an archetype that never really left us, an archetype that always wants their Goose to be super Loose. Of course, I'm talking about Canadian Threshold a.k.a. RUG Delver!
History of the Mongoose
The sheer history of Threshold decks goes all the way back to the old Extended format, where a blue/green based deck named "Gro" flourished, utilizing a low mana curve, loads of cantrips and efficient beaters such as Werebear and Quirion Dryad as finishers. Variants of this deck, such as "Miracle Gro" and "Super Gro" began to place well at larger events.
Over time, Threshold/Gro decks evolved in various ways, adopting different color splashes and different strategies, but none have held their ground as much as Canadian Threshold. Named after David Caplan and Lam Pham (who are from Ontario, Canada), Canadian Threshold was a tempo-based mana denial deck, utilizing the strength of Wasteland
David Caplan piloted the deck that came to be known as Canadian Threshold to a Top 8 finish at GenCon 2007, where the deck looked something like this:
Canadian Threshold - David Caplan
3 Flooded Strand
3 Polluted Delta
4 Tropical Island
4 Volcanic Island
4 Wasteland
4 Nimble Mongoose
4 Tarmogoyf
4 BrainStorm
4 Daze
4 Fire // Ice
4 Force of Will
4 Lightning Bolt
2 Mental Note
4 Opt
4 Spell Snare
4 Stifle
3 EngineeRed Explosives
2 Krosan Grip
2 Pyroblast
3 Pyroclasm
2 Red Elemental Blast
3 Tormod’s Crypt
It's worth noting that the very core of this deck still looks very close to the same today, with some obvious changes based on newer cards that have been printed.
The deck would receive a new upgrade in the form of the printing of Ponder
Enter... Delver of Secrets
With the printing of Delver, blue tempo decks gained quite possibly one of the most evasive creatures ever printed. The deck has continued to evolve, transforming from the old Canadian Threshold much like how Delver transforms into a 3/2 flier by becoming RUG Delver.
RUG Delver, like all other Delver variants except for U/R, experienced the same push out during Khans of Tarkir due to Treasure Cruise
But then, something joyous happened. Wizards banned the Little Elf That Did Bad Things, and suddenly RUG Delver players were reaching for their Mongeese and Goyfs again. The deck hasn't changed much in its time, but its strategy still holds true as a powerful way to attack Legacy as a format.
Living That RUG Lyfe
Let's take a look at what RUG Delver looks like now in 2018.
RUG Delver - Nathan Robinson | SCG Worcester Team Open 2nd Place
4 BrainStorm
4 Daze
4 Delver of Secrets
2 Dismember
2 Flooded Strand
4 Force of Will
4 Lightning Bolt
2 Misty Rainforest
4 Nimble Mongoose
2 Polluted Delta
4 Ponder
2 Scalding Tarn
2 Spell Pierce
2 Spell Snare
4 Stifle
4 Tarmogoyf
3 Tropical Island
3 Volcanic Island
4 Wasteland
2 Abrade
1 FlusterStorm
1 Grafdigger's Cage
1 Life from the Loam
2 Pyroblast
1 Rough/Tumble
1 Submerge
1 Sulfur Elemental
2 Surgical Extraction
1 Sylvan Library
2 True-Name Nemesis
As we can see, not much has really changed long-term for RUG Delver since its glory days. RUG's game plan for a match is fairly simple. Disrupt your opponent's mana through the combination of Wasteland
What gives this deck this kind of game is not just either Wasteland
RUG is a highly efficient, highly tuned machine that can dismantle even the best strategies if it can get out the gate early with mana disruption and a clock. Even during the period of time that RUG Delver was considered universally bad (hint: it wasn't) by the majority of Legacy players, RUG Delver "lifers" soldiered on, tirelessly dedicating time and effort to mastering the deck's every ins and outs.
The Core of the Deck
The Threats
Ever since the introduction of Tarmogoyf
The Mana Denial
The most important part of this deck, effectively knowing how to use Stifle
The blue Package
The obvious "blue" package that goes in nearly every blue deck in the format: Ponder
The Sideboard
Sideboards are always in flux in these kinds of decks, with new options being printed all the time. Cards like Winter Orb
Newer sideboard options like Abrade
Wrapping Up
That's all the time we have for this month, but rest assured we're going to be continuing to look into the various decks of the Legacy format going forward.
Our next article will take a look at a deck that's somewhat near and dear to my own heart, because it's a deck that I actually play in paper Magic and have for quite some time. It's a deck that's highly customizable to play style and can be quite powerful if built properly, but requires a high knowledge of the format to do so. The deck is Nic Fit. The time is next month. We all knew this would happen eventually. Prepare yourselves. Veteran Explorer is coming.
Until next time, may all your Magic be ETERNAL!