, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Exile target instant or sorcery card from your graveyard and target instant or sorcery card from an opponent's graveyard. Copy those cards. Cast the copies if able without paying their mana costs. Exile Spelltwine.

Exile target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Five Kids in a Trenchcoat counts as five creatures for spells and effects that count the number of creatures you control.

Flash
Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)
When you cast this spell, tap up to four target permanents.

: Creatures you control get +1/+1 until end of turn.

This creature gets +1/+1 as long as you control a Mountain.
: This creature gains haste until end of turn. (It can attack and this turn.)

You may tap three untapped Dwarves you control rather than pay this spell's mana cost.
At the beginning of each end step, if a land you controlled was put into a graveyard from the battlefield this turn, reveal the top four cards of your library. You may put any number of Dwarf cards from among them into your hand. Put the rest on the bottom of your library in a random order.

: Target creature with power 2 or less can't be blocked this turn.

Outlast (, : Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Each creature you control with a +1/+1 counter on it has reach. (A creature with reach can block creatures with flying.)

Hanabi Blast deals 2 damage to any target. Return Hanabi Blast to its owner's hand, then discard a card at random.

This creature enters with a +1/+1 counter on it.
Whenever a creature you control with a +1/+1 counter on it becomes the target of a spell an opponent controls, create a 1/1 green Insect creature token.
, : Put a +1/+1 counter on this creature.

When equipped creature deals combat damage to a player, sacrifice this Equipment. If you do, draw three cards.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

, : This creature gets +0/+3 until end of turn.

Whenever this creature deals damage to a player, that player gets a poison counter. (A player with ten or more poison counters loses the game.)

, Sacrifice this creature: It deals damage equal to its power to any target.

First strike
When this creature enters, you may search your library for a legendary card, reveal it, put it into your hand, then shuffle.

Exile up to one target artifact or creature. Return it to the battlefield under its owner's control at the beginning of the next end step.
Explosive Getaway deals 4 damage to each creature.

Vigilance
Whenever Clement or another creature you control enters, return up to one target creature you control with lesser mana value to its owner's hand.
Frogs you control have ": Add or . Spend this mana only to cast a creature spell."

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Tap up to two target creatures. Put a stun counter on either of them. Then put a stun counter on either of them. (If a permanent with a stun counter would become untapped, remove one from it instead.)