Chainflail Centipede

Ward 3 (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3.) Channel — 2U, Discard this card: Counter target spell or ability unless its controller pays 3.

Choose one or more — • Exile all artifacts. • Exile all creatures. • Exile all enchantments. • Exile all graveyards.

This land enters tapped. When this land enters, you gain 1 life. T: Add W or B.

As an additional cost to cast this spell, sacrifice an artifact or creature. You gain life equal to the sacrificed permanent's mana value. Draw two cards.

T: Add G. Channel — 1G, Discard this card: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs 1 less to activate for each legendary creature you control.

Whenever you cast an enchantment spell, if you don't control a creature named Keimi, create Keimi, a legendary 3/3 black and green Frog creature token with "Whenever you cast an enchantment spell, each opponent loses 1 life and you gain 1 life." 1G/U: Tatsunari and target Frog you control can't be blocked this turn except by creatures with flying or reach.

Ninjutsu 2UU (2UU, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Flying When this creature enters from your hand, if it's attacking, create a token that's a copy of another target attacking creature. The token enters tapped and attacking.

Menace Equipped creature has base power and toughness 5/5, has menace, and is a black Demon in addition to its other colors and types. Reconfigure 2BB (2BB: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)