Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle your library. If you sang a song the whole time you were searching and shuffling, you may untap that land.

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

If Leyline of Vitality is in your opening hand, you may begin the game with it on the battlefield.
Creatures you control get +0/+1.
Whenever a creature enters the battlefield under your control, you may gain 1 life.

All Forests and all Saprolings are 1/1 green Saproling creatures and Forest lands in addition to their other types.

, Sacrifice Lifespark Spellbomb: Until end of turn, target land becomes a 3/3 creature that's still a land.
, Sacrifice Lifespark Spellbomb: Draw a card.

: Prevent the next 2 damage that would be dealt to any target this turn.

, Sacrifice a creature: Lyzolda, the Blood Witch deals 2 damage to any target if the sacrificed creature was red. Draw a card if the sacrificed creature was black.

: Target player exiles a card from their graveyard.
Whenever you cast a black spell, you may untap Merrow Bonegnawer.

Metathran Elite can't be blocked as long as it's enchanted.

Flying
When Mirozel becomes the target of a spell or ability, return Mirozel to its owner's hand.

Flash (You may cast this spell any time you could cast an instant.)
When Muck Drubb enters the battlefield, change the target of target spell that targets only a single creature to Muck Drubb.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Enchant creature
Enchanted creature gets +8/+8 and has trample.

, Sacrifice Necrogen Spellbomb: Target player discards a card.
, Sacrifice Necrogen Spellbomb: Draw a card.

: Exile target card from an opponent's graveyard. If no cards are in that graveyard, flip Nezumi Graverobber.

: Put target creature card from a graveyard onto the battlefield under your control.

Soulshift 5 (When this creature dies, you may return target Spirit card with converted mana cost 5 or less from your graveyard to your hand.)

Target creature becomes white until end of turn. Tap that creature.
Draw a card.

Vigilance, trample

Draw a card.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

: Target creature becomes a Frog with base power and toughness 3/3 until end of turn.