Surge of Zeal

Haste granted as a color-spread effect is a strange marriage, and this is the card that consummated it. The radiance mechanic fans an effect out from one target to every creature sharing a color with it, and on most cards in that line the spread carried a built-in tax: helping every shared-color creature could just as easily help the wrong board. Haste rarely turns against you, since granting it to your own creatures almost never hurts, so the color-matching clause becomes a near-pure amplifier rather than a gamble. Point it at a lone attacker on a multicolor board and it does little; point it at a wide mono-red swarm of fresh tokens or a developed aggressive squad and the whole team can swing for one mana. The design quietly rewards a board that floods in bulk rather than one that has already committed to combat, because haste only matters on creatures that just arrived or have yet to attack. It does little for the opponent, whose creatures gain haste on your turn when they cannot attack anyway. The spell pays out hardest when your creatures agree on a color, which makes a mono-red deck the ideal home and a two-color list a poor one. As a demonstration of why color-spread mechanics drift toward symmetrical aggro, few cards in the cycle are this clean.