msem-instigator

Whenever a basic land enters the battlefield under your control, add one mana of any color.

At the beginning of your upkeep, you may return a nontoken creature you control to its owner's hand. If you do, create a 2/2 green Elk creature token.

Whenever a nonland permanent enters the battlefield under an opponent's control this turn, gain control of that permanent until the end of your next turn. It gains haste until end of turn.

Trained Reptile gets +1/+1 for each enchantment you control.
Trained Reptile can't be blocked by creatures with power 2 or less.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Trained Warhawk enters the battlefield, create a 1/1 white Soldier creature token.

When Trainer of the Abyss dies, create a 1/1 black Demon Hound creature token with deathtouch.

Vanguard — Whenever a creature you control attacks alone, draw a card.

Rouse 2. Target permanent you controls fights target creature you don't control if both are creatures. (Distribute two +1/+1 counters among permanents you control. If they aren't creatures, tap them and they become 0/0 creatures in addition to their other types.)

Each creature you control enters the battlefield with an additional +1/+1 counter on it.
When Training Sim enters the battlefield, create a Function token with “Target creature you control fights target creature you don't 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.)

Equipped creature gets +2/+2 and has hexproof and vigilance.
Equip {2}

Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.)
{2}, Discard your hand: Unlock Traitor's Gambit. If the revealed card is red, put it into your hand. Otherwise, put it on top of your library.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Land creatures you control get +1/+1 and have vigilance.
Enchantment creatures you control get +1/+1 and have lifelink.
Artifact creatures you control get +1/+1 and have flying.

Whenever a creature you control attacks and isn't blocked, it explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then you may put that card in your graveyard.)

Tranquil Shrine enters the battlefield tapped.
When Tranquil Shrine enters the battlefield, if you don't control a legendary creature, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

When Transcended Explorer enters the battlefield, if you control another enchantment, draw a card.

Enchant creature
When Transcendent Arts enters the battlefield, draw a card.
Enchanted creature can't be blocked by creatures that don't share a creature type with it.

You may exile a land card from your hand rather than pay this spell's mana cost.

Reveal the top four cards of your library. You may put a creature or Revelation card from among them into your hand. Put the rest into your graveyard.

Draw a card. (Cast a copy of this spell once while this creature is on the battlefield.)

Wanderlust — When Transnaturalist enters the battlefield, if you control four or more differently named lands, you may return target creature to its owner's hand.

{T}: Add {C}.
{7}: Transplanted Citadel becomes a 6/6 Golem artifact creature until end of turn. It's still a land. This ability costs {1} less to activate for each artifact you control.

You may reveal creature cards with mana value 3 or less as you draw them. Once each turn, when you reveal a card this way, you may aetherize it. (To aetherize, create a token that's a copy of it, then exile that token.)

Whenever a creature attacks you or a planeswalker you control, that creature doesn't untap during its controller's next untap step.

Create two 1/1 red Elemental creature tokens.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may change the targets of up to one target spell or ability.