Arcane Signet

This land enters tapped unless you control a Swamp or a Mountain. T: Add B or R.

Elemental permanent spells you cast from your hand gain evoke 4 as you cast them. (If you cast a spell for its evoke cost, it's sacrificed when it enters.) Whenever you sacrifice a nontoken Elemental, create a token that's a copy of it. The token gains haste until end of turn. At the beginning of your next end step, sacrifice it unless you pay WUBRG.

Ward—Blight 2. (To blight 2, a player puts two -1/-1 counters on a creature they control.) Whenever one or more -1/-1 counters are put on a creature, draw a card if you control that creature. If you don't control it, its controller loses 1 life.

First strike, vigilance, trample At the beginning of combat on your turn, another target Elemental you control gains myriad until end of turn. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Each player who controls a creature with power 4 or greater draws a card. Then destroy all creatures.

T: Add one mana of any color that a land an opponent controls could produce.

Spells you control can't be countered. At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Lands you control have "T: Add one mana of any color." T: Add one mana of any color.