At the beginning of your end step, each player may put two +1/+1 counters on a creature they control. Goad each creature that had counters put on it this way. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)

Trample, haste Whenever this creature deals damage to a player, that player discards all the cards in their hand, then draws that many cards.

Flying This creature doesn't untap during your untap step. At the beginning of your upkeep, you may pay {1}. If you do, untap this creature.

Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain.) {R}: This creature gets +1/-1 until end of turn.

{4}{S}{S}: Monstrosity 2. (If this creature isn't monstrous, put two +1/+1 counters on it and it becomes monstrous. {S} can be paid with one mana from a snow source.) As long as this creature is monstrous, it has flying.

When this creature enters, you gain 2 life. When this creature leaves the battlefield, draw a card.

Haste Sacrifice a Goblin: This creature gets +2/+2 and gains trample until end of turn.

This creature enters with two +1/+1 counters on it. Whenever this creature attacks or blocks, remove a +1/+1 counter from it at end of combat.

This creature enters with four +1/+0 counters on it. This creature can't be blocked by Walls. At end of combat, if this creature attacked or blocked this combat, remove a +1/+0 counter from it. {X}, {T}: Put up to X +1/+0 counters on this creature. This ability can't cause the total number of +1/+0 counters on this creature to be greater than four. Activate only during your upkeep.

{1}{R}: Target creature can't block this creature this turn.

This creature can't be blocked. Whenever this creature deals combat damage to a player, you may remove a counter from target permanent.

When this creature dies, create a 1/1 colorless Thopter artifact creature token with flying.

{T}: This creature deals 1 damage to each other creature without flying.

Flying {R}: This creature gets +1/+0 until end of turn.

{U}: This creature gains flying until end of turn.

{2}, Exile this card from your graveyard: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Imprint — When this creature enters, exile target land. Whenever a land an opponent controls with the same name as the exiled card enters, this creature deals 2 damage to that player.

Flying, trample When this creature enters, for each player, destroy up to one nonbasic land that player controls. For each land destroyed this way, its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.

{2}: This creature gains flying until end of turn. (It can't be blocked except by creatures with flying or reach.) {2}: This creature gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) When this creature dies, you may put a -1/-1 counter on target creature.

Flash Protection from artifacts

First strike Landfall — Whenever a land you control enters, this creature gets +2/+2 until end of turn.

Flash You may cast colorless spells as though they had flash. Whenever you cast a colorless spell, until end of turn, this creature gains trample and gets +X/+X, where X is that spell's mana value.

Trample Landfall — Whenever a land you control enters, this creature gets +2/+2 until end of turn.

Menace When this creature enters, you get {E}{E} (two energy counters). Whenever this creature attacks, you may pay {E}. If you do, another target attacking creature gets +1/+0 and gains menace until end of turn.

Sunburst (This enters with a +1/+1 counter on it for each color of mana spent to cast it.) Remove two +1/+1 counters from this creature: Remove a counter from target permanent.

Skulk (This creature can't be blocked by creatures with greater power.) Parallel Universe — Whenever this creature deals combat damage to a player, time travel. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter.)