msem-instigator

You have hexproof.
Creatures you don't control have base power and toughness 1/1 and lose all abilities.
Nonbasic lands you don't control don't untap during their controller's untap step.

Whenever a creature you control enters, you may have it deal damage equal to its power to another target creature or planeswalker.
I, II, III — Exile the top two cards of your library. You may put a creature card from among them onto the battlefield with a +1/+1 counter on it. It gains haste.
IV — Creatures you control get +3/+3 and gain trample until end of turn.

Runescale Brawler enters with three +1/+1 counters on it.
If damage would be dealt to Runescale Brawler while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from Runescale Brawler.

{2}{R}: Ruthless Mastiff gets +3/+0 until end of turn.

S-19 Long Jacket has first strike as long as it's attacking.
S-19 Long Jacket has lifelink as long as it's blocking.

Flying
When Sable Hoopoe enters, draw a card.

[+1]: Draw two cards, then put a card from your hand on the bottom of your library unless you've spent {W}{U}{B}{R}{G} on spells this turn.
[–2]: Add {W}{U}{B}{R}{G}.
[–6]: For each card type, you may return a card of that type from your graveyard to your hand.

Flying
When Sage of Storms enters, untap another target creature you control with flying and put a +1/+1 counter on it.

Whenever you draw a card, put a +1/+1 counter on Sage of Wilds.
Augmented — {T}: Scry 1, then draw a card. Activate only if you've spent {W}{U}{B}{R}{G} to cast spells this turn.

{7}, {T}, Sacrifice Samaki School: Look at the top four cards of your library. Put two into your hand and the rest on the bottom of your library in any order.

Sandblast deals 5 damage to target attacking or blocking creature.

When Savannah Huntsman enters, it deals X damage to target creature or planeswalker, where X is the number of counters among permanents you control.

Defender
{T}: Scale-Crown Archer deals 1 damage to each opponent.
Prismatic — Whenever you cast a multicolored spell, untap Scale-Crown Archer.

Target creature you control gains haste until end of turn. Create a token that's a copy of that creature, then exile that token.

Haste
Motley — At the beginning of your upkeep, if there are five or more names among nonland permanents you control, Scarletblood Hound deals 3 damage to each opponent.

Exile target creature with mana value 2 or less.

Reach
When Scavenging Pack enters, you may destroy target artifact with mana value 2 or less.

Scoured Barrens enters tapped.
When Scoured Barrens enters, you gain 1 life.
{T}: Add {W} or {B}.

Trample
Seasoned Adventurer enters with two +1/+1 counters if you control seven or more lands.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.(Cast a copy of this spell once while this creature is on the battlefield.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Create a 0/4 white Wall creature token with defender.
II — Put a +1/+1 counter on up to one target creature.
III — Until your next turn, each creature you control assigns combat damage equal to its toughness rather than its power.

Deathtouch
Whenever another creature you control dies, each opponent loses 1 life.
{2}{W}: Create a 1/1 colorless Servo artifact creature token.

Target noncreature artifact you control becomes a 0/0 artifact creature. Put three +1/+1 counters on it.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step unless its controller controls no other creatures.

Whenever you cast a Tale, exile target creature an opponent controls until its owner pays {2}. (It enters under its owner's control.)