msem-instigator

Whenever you cast a spell with mana value 5 or greater, create an X/1 red Mutant creature token with trample and haste, where X is that spell's mana value. Exile that token at the beginning of the next end step.

When GenTech Architect enters the battlefield, create a Function token with “Put two +1/+1 counters on a creature you control.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Once during each of your turns, when you sacrifice a permanent, you may have target opponent lose 3 life unless they sacrifice a nonland permanent or discard a card.

Motivate 3 (When this creature enters the battlefield, you may motivate target creature with less power than this by putting three +1/+1 counters on it.)
When General Merthilios motivates a creature, that creature gains first strike, trample, and haste until end of turn.

Reach
Prismatic — Whenever you cast a multicolored spell, you gain 2 life.

Trample
When Ghastly Progenitor enters the battlefield, each opponent reveals their hand. Choose two nonland cards revealed this way. Their owners discard those cards.

Creatures can't attack you or a planeswalker you control unless their controller pays {2} for each of those creatures.
Creatures can't block Ghastly Scraper unless their controller pays {2} for each of those creatures.

Flash

Flying
When Ghastly Spirit enters the battlefield, mill four cards, then return a nonland card from your graveyard to your hand.

Ghost Sloop can't be blocked.
Crew 4 (Tap any number of creatures you control with total power 4 or greater: This Vehicle becomes an artifact creature until end of turn.)
Exile a creature card from your graveyard: Ghost Sloop becomes an artifact creature until end of turn.

Trample

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.) [5/4]
[Lore I-II] Put a +1/+1 counter on up to one other target creature you control.
[Lore III] Target creature must be blocked this turn if able.

Lifelink

Flying
When Gilded Guardian dies, you may search your library for a legendary card, reveal it, put it into your hand, then shuffle.

Prowess
Gilded Gunman gets +1/+1 as long as you control an artifact.

Trample
{3}, Discard Gilded Ram: Draw a card, gain 2 life, and create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Flying
Whenever a player shuffles their library, Gilded Wyvern deals 2 damage to that player.

When Gitaxian Reprocessor enters the battlefield, if you cast it, choose one —
• Create a token that's a copy of another target creature, except it's an artifact and isn't a creature.
• Create a token that's a copy of target noncreature artifact, except it's a 2/2 creature in addition to its other types.

Harmony — Target creature gains flying until end of turn.
When Glamorous Aerialist enters the battlefield, harmonize. (Trigger up to one harmony of one permanent you control.)

{2}{W}, Sacrifice Gleamhorn Elk: Destroy target artifact or enchantment.

When Gleamhorn Gargantuan enters the battlefield, put a +1/+1 counter on up to one other target creature.
Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever you draw your second card each turn, other creatures you control get +1/+1 and gain indestructible until end of turn.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Hexproof
You may have Glen Hunter assign its combat damage as though it weren't blocked.