First strike
Whenever Tormenting Lightrider attacks, if defending player has 10 or less life, Tormenting Lightrider gains double strike until end of turn.
At the beginning of your end step, if a creature died this turn, each opponent loses 3 life unless they discard a card or sacrifice a nonland permanent.

As an additional cost to cast this spell, discard a card.
Draw two cards.

Reach
When Totem-Forest Huntress enters, mill two cards.
Invoke costs you pay cost {1} less to pay.

Up to two target creatures each gain flying until end of turn. Creatures you control get +1/+1 until end of turn.

Defender, haste
{2}{R}, {T}: Create a number of 1/1 red Goblin creature tokens with haste equal to to number of creatures with defender you control. Exile those tokens at the beginning of the next end step. Activate only as a sorcery.

When Tracker's Cigar enters, search your library for a basic land card, reveal it, and put it into your hand, then shuffle.
Equipped creature gets +1/+1.
Equip {1}

When Tradeway Scholar enters, journey.

Trailblazer Anarch has first strike as long as it's your turn.

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

Menace
Corrupt — When this creature enters, if you control a permanent with greater mana value, add {B}{R}.

You may mill two cards. Then destroy target creature if its mana value is less than or equal to the number of cards in your graveyard.

Mill three cards, then return a creature, enchantment, or land card from your graveyard to your hand.

Whenever a creature you control leaves the battlefield, put a +1/+1 counter on Traxian Hoplite.

Whenever Treasury Pilferer becomes the target of a spell you control, you may have it dare 4.
Whenever a Rebel you control deals combat damage to a player, you draw a card and create a Treasure token.

True Dexterity deals 4 damage to target attacking, blocking or tapped creature.

Haste
Whenever Truthcleaver attacks, you may have each player discard a card, then draw a card.
{T}, Sacrifice Truthcleaver: Exile target card from a graveyard. If it was a noncreature, nonland card, you may cast a copy of it.

Multitude {5}{G}{G}
When Tugae Rallier enters, create a 1/1 green Elf creature token. If you control five or more creatures, you may instead put a +1/+1 counter on each creature you control.

Haste
Whenever Tunnel Moles attacks, you may have it phase out.
Whenever Tunnel Moles phases in, it gets +2/+2 until end of turn and can't be blocked by creatures with flying this turn.

Counter target spell with mana value less than or equal to the number of cards in its controller's graveyard.

Double strike

{1}{U}: Surveil 2. Activate only as a sorcery.
{1}{U}, Sacrifice Two Heads Are Better: Add the top two cards of your library to your evil plan.

Destroy target creature if it's tapped or if it has toughness 4 or greater.

{4}, {T}: Tap target creature.

Whenever a Ruin you control becomes spellcharged, it gains haste until end of turn.
Spellcharge 2

Whenever this Subroutine runs, you gain 3 life if an opponent has more life than you. Create two 1/1 white Citizen creature tokens if an opponent controls more creatures than you.