Silvanus's Invoker is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Conjure Elemental — : Untap target land you control. It becomes an 8/8 Elemental creature with trample and haste until end of turn. It's still a land.

Complete guide

Silvanus's Invoker is a formidable Dragon Druid that turns your humble lands into massive threats. By tapping into the power of the land, this creature allows you to surprise opponents with a sudden 8/8 attacker late in the game. It is a perfect inclusion for decks that can generate massive amounts of mana to fuel its Conjure Elemental ability.

What it Does

Silvanus's Invoker features an activated ability called Conjure Elemental. For the cost of eight mana, you target a land you control to untap it and transform it into an 8/8 Elemental creature with trample and haste. Because the land remains a land, it retains all its previous abilities, such as the ability to tap for mana, while gaining the stats and keywords needed to dominate the red zone.

Step-by-Step Resolution

First, you pay the activation cost of eight mana and choose a target land you control. When the ability resolves, the land untaps, even if it was already untapped. It then becomes an 8/8 creature; if the land was played this turn and hasn't been under your control since the start of your turn, it would normally have summoning sickness, but the granted haste keyword allows it to attack or tap for mana immediately.

Common Mistakes

One common mistake is forgetting that the land is still a land and can be destroyed by both creature removal and land destruction spells. Additionally, if the land is already a creature (perhaps from a previous activation), the ability will overwrite its power and toughness to 8/8, but it won't remove other types or abilities it already had. Always remember that the transformation only lasts until the end of the current turn.

When to Play It

This ability is best used during your combat phase to create a high-power attacker, or as a defensive measure during an opponent's turn to create a massive blocker. Since the ability untaps the land, you can tap the land for mana, activate Silvanus's Invoker, and then have that land available again as an 8/8 creature.

Interaction examples

Fueling the Invocation

Solemn Simulacrum

You play Solemn Simulacrum to search for a basic land, putting it onto the battlefield. Later in the game, once you have eight mana available, you use Silvanus's Invoker to turn that land into an 8/8. This sequence ensures you have the mana base required to activate the expensive Conjure Elemental ability.

Surprise Blockers

Sakura-Tribe Elder

You use Sakura-Tribe Elder early to ramp your mana. On your opponent's turn, if they attack with a large creature, you can spend eight mana to activate Silvanus's Invoker, targeting the land you searched for earlier. The land untaps and becomes an 8/8, allowing you to block and potentially destroy the attacking creature.

The Hasty Land

Even if you just played a Forest this turn, you can spend eight mana on Silvanus's Invoker's ability. The land becomes an 8/8 and gains haste, allowing it to bypass the usual summoning sickness rules for lands that just entered the battlefield.

Guide written with AI from the official text and rulings. Official English text prevails.