msem-instigator

{T}, Discard a card: Draw a card.
{1}, {T}, Discard a card: Scry 2, then draw a card.
{4}, {T}, Discard a card: Search your library for a card, put it into your hand, then shuffle.

When Marauder's Broadsword enters the battlefield, you may pay {1}. If you do, create a 1/1 white Soldier creature token and attach Marauder's Broadsword to it.
Equipped creature gets +2/+0.
Equip {2}

At the beginning of your upkeep, draw a card.
At the beginning of your end step, discard a card.

When Mindwave Rod enters the battlefield, attach it to target creature you control.
Equipped creature gets +1/+1 and has “Whenever this creature deals combat damage to a player, draw a card.”
Equip {2}

Equipped creature gets +1/+1.
Equip {1}

This spell costs {1} less to cast for each artifact and/or enchantment you control.
Trample
Exile a cryptic permanent you control or a cryptic card from your graveyard: Observer of Aeons gets +1/+1 until end of turn.

Whenever you cast a spell with • in its text, you may pay {2} any number of times. For each time you do, copy that spell. You may reselect modes and choose new targets for the copy.
{2}, Sacrifice Palaisun, Maktali's Opus: Draw a card.

{2}, {T}: Put a +1/+1 counter on target creature. Activate only as a sorcery.

{2}: Add one mana of any color.

When Remnant of Lost Times enters the battlefield, scry 1.
{2}, Sacrifice Remnant of Lost Times: Draw a card.

Restored Automaton enters the battlefield with X +1/+1 counters on it.
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

Equipped creature gets +2/+2 and has reach and protection from enchantment creatures. (It can't be blocked, targeted, or dealt damage by enchantment creatures.)
Equip {3}

As long as you control another artifact, Ruin Guardian gets +1/+1.

When Ruins' Reward enters the battlefield, draw a card, then discard a card.
{T}: Add one mana of any color.

Hexproof

When Smashing Brute enters the battlefield, target nonbasic permanent loses all abilities until your next turn.
Foresight — Whenever you draw your second card each turn, you may exile Smashing Brute. If you do, return it to the battlefield.

When Sunken Grave enters the battlefield, create a tapped 2/2 black Zombie creature token.
{5}, {T}, Sacrifice Sunken Grave: Create a tapped 2/2 black Zombie creature token.

{1}, Sacrifice Wayfarer's Amulet: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
{3}, Sacrifice Wayfarer's Amulet: Search your library for a riddle card, reveal it, put it into your hand, then shuffle.

As Alratha, Pearl of the Sand Sea enters the battlefield, you may have an opponent investigate. If you don't, it enters the battlefield tapped.
{T}: Add {U}.
{1}{U}, {T}: Investigate.

{T}: Add {C}.
{T}, Pay 1 life: Add {B}.
{5}{B}, {T}, Sacrifice Collapsing Ridges: Return target creature card from a graveyard to the battlefield under your control. Activate only as a sorcery.

{T}: Add {C}.
{T}, Sacrifice a Clue: Draw a card.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast riddle spells.
{1}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Pay 1 life: Add {G}.
{6}{G}, {T}, Sacrifice Ecological Refuge: Create two 3/3 green Wurm creature tokens. Activate only as a sorcery.

{T}: Add {C}.
{T}, Pay 1 life: Add {R}.
{4}{R}, {T}, Sacrifice Path of Fire: Path of Fire deals 3 damage to target player or planeswalker. Activate only as a sorcery.

{T}: Add {C}.
{T}, Pay 1 life: Add {W}.
{5}{W}, {T}, Sacrifice Swaying Sands: Create three 1/1 white Bird creature tokens with flying. Activate only as a sorcery.