Urza's Tower Plant
Legendary Land - Urza's Tower Power-Plant
Obscure - Urza's Tower Plant cannot be searched for.
Urza's Tower Plant enters the battlefield tapped and exerted.
: Add . If you control an Urza's Mine, add instead.

Tower Defense
Creature — Wall
Defender
Creatures with defender you control have "Whenever one or more creatures attack you or a planeswalker you control, this creature deals 1 damage to target attacking creature."
2/6

Pervasive Maneuver
Instant
For each creature attacking you or a planeswalker you control, create a token blocking that creature that is a copy of target creature you control. Exile those tokens at the end of combat.

Man the Walls -
Enchantment
Creatures you control get +1/+1 and have defender.
Sacrifice Man the Walls: Target creature may attack this turn as though it didn't have defender.
"This wall is our home, our family, our comrade-in-arms. And when the time comes to charge forth into the last battle, it is coming with us." - Hendarra, oathsworn vigilant.

Warden on the Walls
Creature — Human Knight
Vigilance
When Warden on the Walls enters the battlefield, create a 1/1 white Human Soldier creature token for each creature you control with defender.
2/2

Warden of the Forest
Legendary Creature - Elf Druid (R)
Counter the first spell that targets a permanent you control each turn.
1/1

Forest Guide
Creature — Spirit
Haste
At the beginning of each player's upkeep, that player gains control of Forest Guide and it explores.
A thousand paths through the forests and they all pass her home.
0/2

Grizzled Guide

Creature - Human Scout
Whenever Grizzled Guide deals combat damage to a player, Choose one -

• Search your library for a land card, reveal it, then shuffle your library and put that card on top
• Reveal the top card of your library. If it's a land, put it onto the battlefield tapped.

"Getting you where you're going is the least of what I can do."
1/3

I can't even... Jo, what fights? The bard? A player, somehow? And it can only not be activated while you have an instant/sorcery on the stack? Is that intended? It's a pretty cool design if it works the way I think it should, but that template confuses the heck out of me.

Bardic College
Land
Whenever you put a lore counter on a nonland permanent, put a lore counter on Bardic College
: add
, remove a lore counter from Bardic College: Add one mana of any color
, remove a lore counter from Bardic College: Add two mana of any one color. Spend this mana only to cast Historic spells.

Updated it to make the creature fight. Also, the activate ability works as you guessed.
This is what happens when you design after some rosé.

Ranger's College
Land
Ranger's College enters the battlefield tapped.
: Add .
At the beginning of each upkeep, you may pay . If you do, target creature you control gains reach until end of turn.

Jethek, Worldly Ranger
Legendary Creature - Human Scout (R)
Hexproof
Whenever Jethek deal combat damage to a player, it gains protection from the player for the rest of the game. (This creature can't be blocked, targeted, dealt damage, or enchanted by anything controlled by that player.)
3/4

To the World's End
Enchantment
Skip your non-combat phases.
Creatures you control get +1/+1 and have haste, vigilance, and trample.
When you control no creatures, sacrifice To the World's End.
"Sex and sleep alone make me conscious that I am mortal." - Alexander the Great

Vigilance is technically not red, but I think it's an okay bleed here.

To the Brig |
Enchantment

~ costs less to cast if it targets a pirate, rogue, or villain.
When you cast ~, choose target creature. When ~ enters the battlefield, exile that creature until ~ leaves the battlefield.

Merchant Brig
Artifact — Vehicle
Whenever Merchant Brig deals combat damage to a player, scry 1 then draw a card.
Crew 2
1/4

Sordid Merchant
Creature - Zombie
Spells you cast cost less to cast.
Spells you cast cost 1 more life to cast.
"A very profitable business, provided you aren't too attached to your stock."
1/3

Merchant Galleon -
Creature - Ship
Whenever Merchant Galleon becomes blocked, defending player draws two cards.
When Merchant Galleon deals combat damage to a player, draw two cards.
Discard a card: Target creature can't block Merchant Galleon this turn.
3/5

Chest of Galleons
Artifact (R)
, shuffle Chest of Galleons into your library: Choose one at random -
• Draw two cards.
• Add three mana of any color.