Errare Humanum Est
This powerful Planeswalker pretty much guaranteed the existence of UW Control for its entire presence in Standard
Teferi, Hero of Dominaria
Arboreal Grazer
Reach
When Arboreal Grazer enters the battlefield, you may put a land card from your hand onto the battlefield tapped.
Collector Boosters feature special frames for certain categories of cards. In Eldraine it was Adventures, in Ikoria it was cards with Mutate and in Zendikar it was cards with Party
In Zendikar it was cards with Landfall
This little cyclops was already a very popular meme in the years leading to its printing
Fblthp, the Lost
This removal spell has been enchantment removal that black players have long asked for
Feed the Swarm
This three drop enchantment creature immediately made waves in Modern and other Eternal Formats
Dryad of the Ilysian Groves
Nexus of Fate
Take an extra turn after this one.
If Nexus of Fate would be put into a graveyard from anywhere, reveal Nexus of Fate and shuffle it into its owner’s library instead.
Among Adventures figured many really powerful, constructed playable Instants, among which were Stomp, Petty Thief, Granted, and Swift End.
Granted is a Sorcery
This five-colored avatar is the fourth iteration of this character in a standard legal set, and the second in the same standard environment
Niv-Mizzet, Reborn
Your opponent has to be very careful around this Mythic Dragon, as it can very high amounts of damage when it dies
Leyline Tyrant
This furry sidekick can grow to a very large size extremely fast, if your deck is built properly around it
Ajani's Pridemate
Rankle, Master of Prankles
Flying, haste
Whenever Rankle, Master of Pranks deals combat damage to a player, choose any number —
• Each player discards a card.
• Each player loses 1 life and draws a card.
• Each player sacrifices a creature.
Eliminate is a really strong uncommon in M21 limited, allowing you to trade up with powerful rares like Radah, Gadrak or Garruk's Harbinger
Garruk's Harbinger has Hexproof from Black
This couple of horned clerics was the first BAB promo
Firesong and Sunspeaker
Much fanfare was made aroudn this alternative wincon card giving card draw options to white, which inevitable turned out to be a disappointment
Happily Ever After
This member of the brazen coalition is good at stealing your opponent's stuff, but still makes you pay the price
Hostage Taker
Experimental Frenzy
You may look at the top card of your library any time.
You may play lands and cast spells from the top of your library.
You can’t play lands or cast spells from your hand.
{3}{R}: Destroy Experimental Frenzy.
Blinking a Mutate pile has some really interesting interactions: it splits it, returning every component to the field, unless one of them happened to be a token, which won't be returned, or a commander, which allows you to put the entire stack in the command zone
You can't put the entire stack in the command zone, only your commander.
This legendary vanilla was, very fittingly, spoiled on a wednesday
Yargle, Glutton of Urborg
This mythic copy spell is the blue member in a cycle completely illustrated by Seb McKinnon
Mythos of Illuna
This split card can prompt some layered rulings questions, but if you want to avoid that you can always tutor for a couple of spells
Invert // Invent
Nissa, Who Shakes the World
Whenever you tap a Forest for mana, add an additional {G}.
+1: Put three +1/+1 counters on up to one target noncreature land you control. Untap it. It becomes a 0/0 Elemental creature with vigilance and haste that’s still a land.
−8: You get an emblem with “Lands you control have indestructible.” Search your library for any number of Forest cards, put them onto the battlefield tapped, then shuffle your library.
TBAs happen automatically and don't use the stack. There is one unique to the untap step, untapping your permanents, none in the upkeep, and one in the draw step, drawing for turn.
There are two turn-based actions unique to the Untap Step: Phasing is handled before untapping
This extremely simple card, who nonetheless received an errata as it was reprinted, was designed by Maro to prove a point
Isamaru, Hound of Konda
This green saga depicts the Goddes Klothys taking up her role as the guardian of the underworld
The Binding of the Titans