Red/Blue
HP: 117
W: +2
B: +3
K: 0
R: +3
G: -1
4 creature slots
10 spell slots
5 support slots
Ability 1
Destroy 1/2/3/4 non-red, non-blue gems then gain 1/2/3/4 mana
Ability 2
Create an increasing number of elemental tokens with “Whenever you cast a spell, this creature gets +1/+1”
Ability 3
Create a support with “Whenever you cast a spell, if there is a spell in your graveyard with the same name, copy that spell, you may pick new targets for the copy”
you could always do one of each 
@FindingHeart8 perhaps my third ability should be labeled “Gauntlet”…
Toodles, Just Toodles
20 hp, 10/10/10 slots, +5 all matches (including loyalty)
0: Create a support with two charges and “You take no damage and deal no damage until your next turn.” This support does not stack.
9: Fill your hand up to 6 cards then each card in hand gains 6 mana.
30: Win the game unless your opponent has 3 creatures in play, 6 cards in hand, or a full life total.
This is cool but I’m not very good at things like this.
Name: Erroxian
Race: Human
Affinity: White/Blue/Black
Mana gains: W+3/U+2/B+3/G-1/R+0
Life: 102
Ability cost: 9/18/22
Bide: Target creature you control gets -3/-3 then drain opponent of 2 mana and 2 loyalty
Target creature you control gets -3/-3 then drain opponent of 3 mana and 3 loyalty
Target creature you control gets -2/-2 then drain opponent of 4 mana and 4 loyalty
Target creature you control gets -1/-1 then drain opponent of 4 mana and 4 loyalty
Dishonor: Create a support with 1/2/3/4 shields that says "When opponent matches three or more gems all mana and loyalty that would be gained is cancelled, then this support loses one shield.
Deceive: Destroy the first creature you control then return creature to the field with +1/+1 and lifelink
Destroy the first creature you control then return creature to the field with +2/+2 and lifelink
Destroy the first creature you control then return creature to the field with +2/+2 lifelink and vigilance
Destroy target creature you control then return creature to the field with +3/+3 lifelink, vigilance and regenerate 3
Name:
Szamsziel the Sinner
6/6/6
+6B/+6R/-2U/-2G/-3W
Life: 131
R/B
Ability 1 - (Lust) Discard your hand. Draw (3/4/5/6) cards. For each creature you drawn gain 3 mana. For each spell you drawn loose 2 mana. For each support you drawn loose 1 life.
Ability 2 - (Greed) First creature you own get (1/2/3/4) abilities selected randomly from the remaining keyword abilities. If creature have all abilities, destroy all your creatures.
Ability 3 - (Wrath) Fetch one (common/uncommon/rare/mythic) you own (outside the game). If it’s a creature or support - put it directly on battlefield. If it’s a spell cast it immediately.
Name: Snaurtle, The Awkward Alchemist
Cost: 581 crystals or $31.42
HP: 85
Blk/W
W: +6
B: -3
Blk: +4
R: -1
G: 1
Ability 1 “Radical Faith”; 8 cost:
Summon 1 5/5 Mechanized Ethereal Turtle with Flying and Double-strike and, “When this creature attacks it loses -1/-1 and your other creatures gain lifelink and deathtouch until the end of your turn”
Ability 2 “Bloated Experimentation”; 13 cost:
Create a support with 3 shields with, “When one of your creatures attacks it loses -2 toughness you lose 5 life and you gain 4 mana”
Ability 3 “Molt for Maturin”; cost Eleventy-seven:
Target creature you control gains Hexproof and Reach and "When this creature dies you summon 1 12/12 cosmic turtle with berserker, trample and first strike with 'When this creature dies you summon 1 1/1 Regular Turtle with Determination with 'when this creature attacks it gains +3/+3 and your first creature gains +1/+1 and when this creatures dies you summon 1 0/1 tadpole with 'at the beginning of your turn you lose 10 life and whenever you match 3 gems you lose 6 mana and a text shows that reads, ‘you have failed our reptilian overlords for getting to the tadpole’ "
bken1234, The Consummate Taskmaster
R/W
R+4, W+4, U, B +2
4 creature slots, 5 spell slots, 8 support slots
Ability 1 (3 loyalty) Army of Noobs
Summon 1 1/1 Bronze Warrior token with “When you cast a common or uncommon creature, spell or support, this creature gains +1/+1”
Ability 2 (12 loyalty) Cheers to Those Who Build Creative Decks
Create a support with “Whenever your opponent casts a card with “cycling” anywhere in the text, they lose 10 life” This support can be brought back by Starfield of Nyx
Ability 3 (30 loyalty) The Ultimate Delegator
If you get 5 or more Discord notifications in a match, your match is automatically paused and will be transferred to @spadpl to finish.
Snappyturtle: I don’t think it’s what you meant, but I think a Planeswalker that got 1 mana per green match no matter how many gems are involved or something similar would be quite interesting.
bken1234: I’ve been wondering about a similar idea to that second ability. I was wondering if they could make Planeswalker abilities and/or cards that create cards and play them, or put them in your hand with full mana to help with some objectives.
I was trying to make it awkward like me. Where my thoughts are coherent but most of the time when I try to show or give the information I have in my head, it comes out a garbled mess. That 1 Green match was the best I could come up with for the mana gains.
And being late at night, I just gave up halfway through the 3rd ability for sleep. Forgot tadpoles are amphibian and not reptilian like turtles.
i would like one the first ability is destroy a support for 6? non targeted of course