msem-instigator

Thriving Heath enters tapped.
As Thriving Heath enters, choose a color other than white.
{T}: Add {W} or one mana of the chosen color.

Whenever Seeker of Battle attacks, put a +1/+1 counter on each creature you control. Those creatures gain trample until end of turn.

Target creature gains deathtouch until end of turn.
Draw a card.

Whenever equipped creature attacks or blocks, it gets +3/+3 and gains hexproof until end of turn.
Equip {1}

Desert Wurms can't be blocked by creatures with flying.
When Desert Wurms enters, create two 6/6 red Wurm creature tokens with “This creature can't be blocked by creatures with flying.”
When Desert Wurms is put into a graveyard from anywhere, shuffle it into its owner's library.

Erratic, erratic, erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order. Repeat this process twice.)

When a creature you control becomes the target of a spell or ability an opponent controls, sacrifice Bestial Harmony. If you do, draw three cards.

You may cast this spell by paying {1}{W}{U}{B}{R}{G} rather than paying its mana cost.
Defender, indestructible
Lands you control are 2/2 Spirit creatures with haste and indestructible.

Target creature gets -1/-2 until end of turn.
Target creature gets +2/+1 until end of turn.

You have hexproof.
Adorned — Youthful Savior has hexproof as long as it's equipped and/or enchanted.

Art of war — At the beginning of your end step, if Kowareta Scrounger dealt damage to an opponent this turn, you may search your library for an artifact card, reveal it, put it into your hand, then shuffle.

This spell can't be countered.
Hexproof

Return target artifact or creature card from your graveyard to your hand.
Draw a card.

First mate — Each land card in your starting deck has a different name. (If this card outside the game is your chosen first mate, you may swap it with a card in your opening hand.)
Lifelink, vigilance
Asabeth of the Intrepid's power and toughness are each equal to the number of lands you control.

You draw a card and you lose 1 life.
Whenever you cast a spell from anywhere other than your hand, you may pay 1 life. If you do, return Desolate Advance from your graveyard to your hand.

Creatures you control get +2/+1 until end of turn. Scry 1.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Idleglen Instructor enters, draw a card, then discard a card.

Flying
Whenever Immaculate Clouddasher attacks, up to three target creatures gain flying until end of turn.

When Mechanical Mastodon enters, you may return another target permanent you control to its owner's hand.

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
Whenever a creature you control becomes renowned, create a 1/1 red Soldier creature token with haste.

As Superset enters, choose two abilities from among flying, first strike, lifelink, prowess, and vigilance.
Each creature you control with exactly one of the chosen abilities has the other chosen ability.

Lifelink
Augmented — Whenever you cast a spell, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on United Guardian. It loses this ability and gains “Whenever United Guardian attacks, create two 1/1 blue Elemental creature tokens with flying that are tapped and attacking.”

Prowess

Light the Fuse deals 3 damage to target creature or planeswalker. Whenever a permanent dealt damage by Light the Fuse this turn dies this turn, repeat that process.