Teferi, Temporal Pilgrim [The Brothers' War: Prerelease Promos]Set: The Brothers' War: Prerelease Promos Type: Legendary Planeswalker Teferi Rarity: Mythic Cost: {3}{U}{U} Whenever you draw a card, put a loyalty counter on Teferi, Temporal Pilgrim. 0: Draw a card. 2: Create a 2 2 blue Spirit creature token with vigilance and "Whenever you draw a card, put a +1 +1 counter on this creature." 12: Target opponent chooses a permanent they control and returns it to its owner's hand. Then they shuffle each nonland

Set: World Championship Decks 1997 Type: Land Rarity: Rare {T}: Add one mana of any color

Set: Guildpact Type: Sorcery Rarity: Rare Cost: {X}{U}{U}{R} Choose one —

Set: Jumpstart Type: Creature — Giant Rarity: Mythic Cost: {4}{G}{G} Towering Titan enters the battlefield with X +1/+1 counters on it

Disturb {1}{W} (You may cast this card from your graveyard transformed for its disturb cost

goblin engineer

Set: Diamond & Pearl: Stormfront Type: Grass Rarity: Uncommon Retreat cost: Colorless

Set: Secret Lair Countdown Kit Type: Creature — Dragon Rarity: Mythic Cost: {6}{R}{R} Flash

Note the number and kind of counters that were on that creature

other creatures you control gain double strike until end of turn

Set: Planechase Anthology Planes Type: Plane — Alara Rarity: Common All creatures have exalted

"If my hypothesis is correct

piercing and true