How strong is my Terra Esper infinite combo Commander deck list?

[SeekerOfTruth007]

So I threw this deck together an hour before League yesterday, and I won 3 out of 6 games with the following combinations:

Commander: Terra, Magical Adept

Reverse side of card:

This creates an infinite combo with "Spark Double" and "Sakashima of a Thousand Faces".

Spark double:

Sakashima:

Now you might be wondering, "How do you get both of these creatures and the flipped Commander onto the Battlefield fast enough to win vs competitive decks? Truth is I only need one or the other to "Go Infinite" with Terra, but I grab both as backup with this:

Defense of the Heart:

Alternative win conditions are:

Thassa's Oracle:

and Replenish to get back all my Enchantments if the opponents board wipe me.

And I can get back anything with Regrowth and Nostalgic Dreams, including additional copies of Replenish.

This deck can win as early as turn 2 with Thassa's Oracle, but it's pretty low odds. It's more likely to win on turn 4-6 with Mana Rocks support.

Anyway, winning 3 out of 6 pods of 4 players is not bad for a deck I put together in 30 minutes just one hour before the League was played.

[AI Opinion]

For something you built in 30 minutes, 3 wins in 6 four‑player pods is actually impressive 😊

Your core infinite line with Terra + Spark Double / Sakashima is solid, but it’s still fragile: it folds to cheap interaction, graveyard hate, and fast stax. Turn‑4–6 goldfish is more “high‑power casual” than true cEDH.

Tighten tutors, run cheap protection (Fierce Guardianship, Flusterstorm, Swan Song), more 1–2 cmc rocks, and redundancy for Oracle lines to push it toward competitive.

[SeekerOfTruth007]

I have 10 Tutors and around 10 pieces of ramp in the deck already.

[msc545]

What kind of league is it that you compete in? I didn't realize there was one. Tell me about it, please.

[SeekerOfTruth007]

I don't know if it's official, but the card shop where I play holds a league, and whoever earned the most points at the end of the season wins a prize. It may be a free collectible card or even an entire pack of cards, etc. It's free to enter, but you need cards and you're not allowed to use proxies of cards worth more than $80, which I never proxy anyway.

[SeekerOfTruth007]

Anyway, for Commander, (Also known as EDH "Elder Dragon Highlander") you pick one Legendary Creature card to be your commander, and you build a deck of exactly 99 additional cards to support your commander. You may only have one copy of each card, except basic lands which may be duplicates. Some cards are banned because they are considered too powerful or too cheap for what they do.

Additionally, the cards in your 99 must share at least one color with the commander's "Color Identity"* or they must be colorless.

Color identity consists of the sum of the Mana Value of the Commander plus the colors in any abilities the commander has, so Terra, Magical Adept is a five-color Commander, because she has an ability with all 5 colors of mana symbols in it, even though her "Mana Value" is only two-colored. Therefore, I can play all 5 colors in my deck with very little drawback. Just use a lot of multi-colored mana rocks and green ramp, which green is the primary mana base of the deck, and I have access to all 5 colors usually within 3 turns.