Wizard's Rockets enters tapped. {X}, {T}, Sacrifice Wizard's Rockets: Add X mana in any combination of colors. When Wizard's Rockets is put into a graveyard from the battlefield, draw a card.
{T}: Exile target instant or sorcery card from a graveyard. Roll a d20. Activate only as a sorcery. 1—9 | Copy that card. You may cast the copy. 10—19 | Copy that card. You may cast the copy by paying {1} rather than paying its mana cost. 20 | Copy each card exiled with Wizard's Spellbook. You may cast any number of the copies without paying their mana costs.
When Woe Strider enters, create a 0/1 white Goat creature token. Sacrifice another creature: Scry 1. Escape — {3}{B}{B}, Exile four other cards from your graveyard. Woe Strider escapes with two +1/+1 counters on it.
When Wolfrider's Saddle enters, create a 2/2 green Wolf creature token, then attach Wolfrider's Saddle to it. Equipped creature gets +1/+1 and can't be blocked by more than one creature. Equip {3}
Enchant land Whenever enchanted land is tapped for mana, its controller adds an additional {G}. {4}{G}, Sacrifice Wolfwillow Haven: Create a 2/2 green Wolf creature token. Activate only during your turn.
Prototype {2}{G}{G} — 3/3 When Woodcaller Automaton enters, if you cast it, untap target land you control. It becomes a Treefolk creature with haste and base power and toughness equal to Woodcaller Automaton's power and toughness. It's still a land.
Search your library for a basic land card, reveal it, put it into your hand, then shuffle. It perpetually becomes a Clue artifact in addition to its other types and gains "{2}, Sacrifice this permanent: Draw a card."